Many incunabula are undated, needing complex bibliographical analysis to place them correctly. The post-incunabula period marks a time of development during which the printed book evolved fully as a mature artefact with a standard format. After about 1540 books tended to conform to a pattern that included the author, title-page, date, seller, and place of printing. This makes it much easier to identify any particular edition.
The number of printing towns and cities stands at 282. These are situated in some 18 countries in terms of present-day boundaries. In descending order of the number of editions printed in each, these are: Italy, Germany, France, Netherlands, Switzerland, Spain, Belgium, England, Austria, the Czech Republic, Portugal, Poland, Sweden, Denmark, Turkey, Croatia, Serbia, Montenegro, and Hungary (see diagram).
The following table shows the 20 main 15th-century printing locations; as with all data in this section, exact figures are given, but should be treated as close estimates (the total editions recorded in ISTC at August 2016 is 30,518):
Apart from migration to mainly North American and Japanese universities, there has been little movement of incunabula in the last five centuries. None were printed in the Southern Hemisphere, and the latter appears to possess fewer than 2,000 copies, while about 97.75% remain north of the equator. However, many incunabula are sold at auction or through the rare book trade every year.
Greenfield, Jane (2002). ABC of bookbinding: a unique glossary with over 700 illustrations for collectors and librarians. New Castle (Del.) Nottingham (GB): Oak Knoll press The Plough press. p. 37. ISBN 978-1-884718-41-0. 978-1-884718-41-0
The British Library Incunabula Short Title Catalogue Archived 12 March 2011 at the Wayback Machine (retrieved 16 August 2021) gives 30,518 editions, though this includes some which have been re-dated to the early 16th century. /wiki/British_Library
According to Bettina Wagner: "Das Second-Life der Wiegendrucke. Die Inkunabelsammlung der Bayerischen Staatsbibliothek", in Griebel, Rolf; Ceynowa, Klaus (eds.): "Information, Innovation, Inspiration. 450 Jahre Bayerische Staatsbibliothek", K G Saur, Munich 2008, ISBN 978-3-598-11772-5, pp. 207–224 (207f.) the Incunabula Short Title Catalogue lists 30,375 titles published before 1501. /wiki/ISBN_(identifier)
J. Green, F. McIntyre, P. Needham (2011), "The Shape of Incunable Survival and Statistical Estimation of Lost Editions", Papers of the Bibliographical Society of America 105 (2), pp. 141–175. doi:https://doi.org/10.1086/680773 https://doi.org/10.1086/680773
Badische Landes-Bibliothek (in German) https://www.blb-karlsruhe.de/sammlungen/inkunabeln/
As late as 1891 Rogers in his technical glossary recorded only the form incunabulum: Rogers, Walter Thomas (1891). A Manual of Bibliography (2nd ed.). London: H. Grevel. p. 195.
The word incunabula is a neuter plural only; the singular incunabulum is never found in Latin, and is no longer used in English by most bibliographers.
C. T. Lewis and C. Short, A Latin Dictionary, Oxford 1879, p. 930.
"incunabula". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.) https://www.oed.com/search/dictionary/?q=incunabula
"Fifteener" was coined by bibliographer Thomas Frognall Dibdin, a term endorsed by William Morris and Robert Proctor. (Carter & Barker 2004, p. 130). /wiki/Thomas_Frognall_Dibdin
Hadrianus Iunius, Batavia, [...], [Lugduni Batavorum], ex officina Plantiniana, apud Franciscum Raphelengium, 1588, p. 256, line 3. /wiki/Hadrianus_Junius
Glomski, J. (2001). "Incunabula Typographiae: seventeenth-century views on early printing". The Library. 2 (4): 336. doi:10.1093/library/2.4.336. /wiki/Doi_(identifier)
Bernardus a Mallinkrot, De ortu ac progressu artis typographicae dissertatio historica, [...], Coloniae Agrippinae, apud Ioannem Kinchium, 1640 (in frontispiece: 1639), p. 9, line 16. The term appears within a long passage of several pages (pp. 27–33; corresponding to Batavia, pp. 253–58), set in italics to indicate a quotation, and attributed to Junius. /wiki/Bernhard_von_Mallinckrodt
Sordet, Yann (2009). "Le baptême inconscient de l'incunable: non pas 1640 mais 1569 au plus tard". Gutenberg Jahrbuch (in French). 84: 102–105. https://hal.archives-ouvertes.fr/hal-00791398v2
"incunabula | printing | Britannica". www.britannica.com. Retrieved 26 October 2022. https://www.britannica.com/topic/incunabula
"incunabula". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.) https://www.oed.com/search/dictionary/?q=incunabula
Hadrianus Iunius, Batavia, [...], [Lugduni Batavorum], ex officina Plantiniana, apud Franciscum Raphelengium, 1588, p. 256, line 3. /wiki/Hadrianus_Junius
Glomski, J. (2001). "Incunabula Typographiae: seventeenth-century views on early printing". The Library. 2 (4): 336. doi:10.1093/library/2.4.336. /wiki/Doi_(identifier)
Walsby & Kemp 2011, p. viii. - Walsby, Malcolm; Kemp, Graeme, eds. (2011). The Book Triumphant: Print in Transition in the Sixteenth and Seventeenth Centuries. Brill. p. viii. ISBN 978-90-04-20723-3. https://books.google.com/books?id=cysqnfvAUEAC&pg=PR7
Oxford Companion to the Book, ed. M. F. Suarez and H. R. Woudhuysen, OUP, 2010, s.v. 'Incunabulum', p. 815.
Daniel De Simone (ed), A Heavenly Craft: the Woodcut in Early Printed Books, New York, 2004, p. 48.
Walsby, Malcolm; Kemp, Graeme, eds. (2011). The Book Triumphant: Print in Transition in the Sixteenth and Seventeenth Centuries. Brill. p. viii. ISBN 978-90-04-20723-3. 978-90-04-20723-3
Walsby & Kemp 2011, p. viii. - Walsby, Malcolm; Kemp, Graeme, eds. (2011). The Book Triumphant: Print in Transition in the Sixteenth and Seventeenth Centuries. Brill. p. viii. ISBN 978-90-04-20723-3. https://books.google.com/books?id=cysqnfvAUEAC&pg=PR7
Carter, John; Barker, Nicolas (2004). ABC for Book Collectors (8th ed.). New Castle, Del.: Oak Knoll Press and the British Library. p. 172. ISBN 1-58456-112-2. Archived from the original (PDF) on 21 November 2017. Retrieved 28 May 2010.
1-58456-112-2
Carter & Barker 2004, p. 172. - Carter, John; Barker, Nicolas (2004). ABC for Book Collectors (8th ed.). New Castle, Del.: Oak Knoll Press and the British Library. p. 172. ISBN 1-58456-112-2. Archived from the original (PDF) on 21 November 2017. Retrieved 28 May 2010. https://web.archive.org/web/20171121030905/https://www.ilab.org/download.php?object=documentation&id=29
BL.uk Archived 12 March 2011 at the Wayback Machine, consulted in 2007. The figures are subject to slight change as new copies are reported. Exact figures are given but should be treated as close estimates; they refer to extant editions. https://www.bl.uk/catalogues/istc/index.html
"Index: Place of Publication: Venice", Incunabula Short Title Catalogue, retrieved 3 December 2017 http://data.cerl.org/istc/_search?query=data.imprint.imprint_place:%22Venice%22
"Index: Place of Publication: Paris", Incunabula Short Title Catalogue, retrieved 3 December 2017 http://data.cerl.org/istc/_search?query=data.imprint.imprint_place:%22Paris%22
"Index: Place of Publication: Rome", Incunabula Short Title Catalogue, retrieved 3 December 2017 http://data.cerl.org/istc/_search?query=data.imprint.imprint_place:%22Rome%22
"Index: Place of Publication: Cologne", Incunabula Short Title Catalogue, retrieved 3 December 2017 http://data.cerl.org/istc/_search?query=data.imprint.imprint_place:%22Cologne%22
"Index: Place of Publication: Lyons", Incunabula Short Title Catalogue, retrieved 3 December 2017 http://data.cerl.org/istc/_search?query=data.imprint.imprint_place:%22Lyons%22
"Index: Place of Publication: Leipzig", Incunabula Short Title Catalogue, retrieved 3 December 2017 http://data.cerl.org/istc/_search?query=data.imprint.imprint_place:%22Leipzig%22
"Index: Place of Publication: Augsburg", Incunabula Short Title Catalogue, retrieved 3 December 2017 http://data.cerl.org/istc/_search?query=data.imprint.imprint_place:%22Augsburg%22
"Index: Place of Publication: Strassburg", Incunabula Short Title Catalogue, retrieved 3 December 2017 http://data.cerl.org/istc/_search?query=data.imprint.imprint_place:%22Strassburg%22
"Index: Place of Publication: Milan", Incunabula Short Title Catalogue, retrieved 3 December 2017 http://data.cerl.org/istc/_search?query=data.imprint.imprint_place:%22Milan%22
"Index: Place of Publication: Nuremberg", Incunabula Short Title Catalogue, retrieved 3 December 2017 http://data.cerl.org/istc/_search?query=data.imprint.imprint_place:%22Nuremberg%22
"What Are Incunables? - YTread". youtuberead.com. Retrieved 2 April 2023. https://youtuberead.com/what-are-incunables
"ISTC". Archived from the original on 18 November 2021. Retrieved 16 May 2009. https://web.archive.org/web/20211118093805/http://www.bl.uk/catalogues/istc/
"Incunabula". Bayerische Staatsbibliothek. Retrieved 18 January 2023. https://inkunabeln.digitale-sammlungen.de/
"Early Printed Books". British Library. Archived from the original on 23 December 2019. Retrieved 18 January 2023. https://web.archive.org/web/20191223140256/https://www.bl.uk/collection-guides/early-printed-books
"Les Incunables". Bibliothèque nationale de France. Retrieved 7 September 2013. http://classes.bnf.fr/livre/arret/histoire-du-livre/imprimerie/05.htm
"All catalogues". Vatican Library. Archived from the original on 16 June 2013. Retrieved 21 May 2013. https://archive.today/20130616134430/http://opac.vatlib.it/iguana/www.main.cls?v=50cb035c-301c-11e1-925a-5056b2002600
"2021 Jahresbericht" (PDF). Österreichische Nationalbibliothek. p. 53. Retrieved 18 January 2023. https://www.onb.ac.at/fileadmin/user_upload/1_Sitemap/Ueber_Uns/Jahresberichte/oenb_jahresbericht2021_web.pdf
А.В. Лихоманова; Н.В. Николаев, eds. (2015). Путеводитель по фондам Отдела редких книг Российской национальной библиотеки. Санкт-Петербург: РНБ. p. 3. ISBN 978-5-8192-0483-2. Путеводитель по фондам Отдела редких книг Российской национальной библиотеки978-5-8192-0483-2
"WLB in Zahlen 2021". Württembergische Landesbibliothek. Retrieved 18 January 2023. https://www.wlb-stuttgart.de/die-wlb/wir-ueber-uns/wlb-in-zahlen-2021/
"Rare Books in Western Languages". Bodleian Library, University of Oxford. Retrieved 18 January 2023. https://www.bodleian.ox.ac.uk/weston/finding-resources/guides/rarebooks
"Rare Books and Special Collections: Europe". Library of Congress. Retrieved 3 September 2020. https://www.loc.gov/rr/rarebook/guide/europe.html
Выставочный проект На благое просвещение: Румянцевский музей, Московский период, Индрик, 2005, ISBN 978-5-85759-308-0 https://books.google.com/books?hl=en&id=WwkjAQAAIAAJ&q=5360
"Early Printed Books and Printing History". The Huntington Library, Art Museum, and Botanical Gardens. Retrieved 3 September 2020. https://www.huntington.org/collections/early-printed-books
"Incunabula". Cambridge University Library. 10 October 2018. Retrieved 18 January 2023. https://www.lib.cam.ac.uk/collections/departments/rare-books/rare-books-collections/incunabula
"Biblioteca nazionale di Napoli "Vittorio Emanuele III"" (in Italian). Ministero per i beni e le attività culturali e per il turismo. Retrieved 3 September 2020. https://www.beniculturali.it/luogo/biblioteca-nazionale-vittorio-emanuele-iii
"Rare Books". Royal Danish Library. Retrieved 12 January 2021. http://www5.kb.dk/en/nb/samling/boghistoriske_samlinger/index.html
"Guide to Special Collections: Printed books". The University of Manchester Library. Retrieved 12 January 2021. https://www.library.manchester.ac.uk/search-resources/special-collections/guide-to-special-collections/printed-books/
"Zahlen und Fakten" (in German). Staatsbibliothek zu Berlin. Archived from the original on 19 January 2021. Retrieved 18 January 2023. https://web.archive.org/web/20210119125937/https://staatsbibliothek-berlin.de/die-staatsbibliothek/zahlen-und-fakten/
Whitesell, David (2006). First supplement to James E. Walsh's Catalogue of the fifteenth-century printed books in the Harvard University Library. Cambridge, Mass.: Houghton Library. p. xiii. ISBN 978-0-674-02145-7. OCLC 71691077. 978-0-674-02145-7
"Incunabula". National Library of the Czech Republic. Retrieved 18 January 2023. http://text.en.nkp.cz/collections/by-document-type/historical-book-collection/manuscripts-and-incunabula/inkunabule-en
"La Biblioteca – Informazioni generali – Patrimonio librario" (in Italian). Biblioteca Nazionale Centrale di Firenze. Archived from the original on 18 July 2011. Retrieved 7 March 2011. https://web.archive.org/web/20110718040109/http://www.bncf.firenze.sbn.it/pagina.php?id=51&rigamenu=Patrimonio
"DRUCKE" (in German). Universitätsbibliothek Leipzig. Retrieved 3 September 2020. https://www.ub.uni-leipzig.de/forschungsbibliothek/historische-bestaende/drucke/#c1061
"The Jagiellonian University Library Collection". Biblioteka Jagiellońska. 31 December 2009. Archived from the original on 7 June 2011. Retrieved 7 March 2011. https://web.archive.org/web/20110607164641/http://www.bj.uj.edu.pl/o_bib/bj_w_licz1_en.php
"Historic collections in figures". Universitätsbibliothek der LMU München. Retrieved 3 September 2020. https://www.en.ub.uni-muenchen.de/about/historic_collections/historic_collections_figures/index.html
"The State Library in Numbers". Bamberg State Library. Retrieved 3 September 2020. https://www.staatsbibliothek-bamberg.de/en/about-us/profile/#c3912
"Herzog August Library – Inkunabeln -Bestandsgeschichte" (in German). Archived from the original on 15 September 2015. Retrieved 3 September 2020. https://web.archive.org/web/20150915162250/http://www.hab.de/de/home/bibliothek/bestaende/bestandsgeschichte/inkunabeln.html
"The University Library in figures". Universitätsbibliothek Freiburg. Retrieved 3 September 2020. https://www.ub.uni-freiburg.de/en/about-us/library-profile/figures/
"Old Prints Department - Collections". bu.uni.wroc.pl. Retrieved 18 January 2023. https://www.bu.uni.wroc.pl/en/departments/special-collections/old-prints-department-collections
"Biblioteca Nacional de España – Colecciones – Incunables" (in Spanish). Biblioteca Nacional de España. 11 March 2011. Retrieved 3 September 2020. http://www.bne.es/es/Colecciones/Incunables/Historia/index.html
"Inkunabeln und Seltene Drucke" (in German). Niedersächsische Staats- und Universitätsbibliothek Göttingen. Retrieved 3 September 2020. https://www.sub.uni-goettingen.de/sammlungen-historische-bestaende/inkunabeln-und-seltene-drucke/
"Die Inkunabelsammlung der UB". Universitätsbibliothek Würzburg. Retrieved 3 September 2020. http://vb.uni-wuerzburg.de/ub/inkunabeln/sammlungen.html
"Official Website of Palatina Library". http://www.bibpal.unipr.it/index.php?en/1/home
"Alte Drucke" (in German). UB Basel. Retrieved 3 September 2020. https://ub.unibas.ch/de/historische-bestaende/alte-drucke-438/
"Patrimonio librario" (in Italian). Biblioteca Nazionale Marciana. 22 November 2010. Retrieved 3 September 2020. https://marciana.venezia.sbn.it/la-biblioteca/il-patrimonio/patrimonio-librario
"Handschriften und Inkunabeln" (in German). Universitätsbibliothek Johann Christian Senckenberg. Retrieved 3 September 2020. https://www.ub.uni-frankfurt.de/hsn/hsn.html
"The Incunable Collection". Retrieved 4 September 2020. https://www.ub.uu.se/finding-your-way-in-the-collections/selections-of-special-items-and-collections/incunable-collection/
"COLLECTIONS". Biblioteca comunale dell'Archiginnasio. Retrieved 4 September 2020. http://www.archiginnasio.it/collections.htm
"Incunables" (in French). Bibliothèque Mazarine. Retrieved 4 September 2020. https://www.bibliotheque-mazarine.fr/fr/collections/fonds-particuliers/incunables
"Official Website of Braidense National Library". http://www.braidense.it/risorse/
"Inkunabeln" (in German). Universitäts- und Stadtbibliothek Köln. Retrieved 3 September 2020. https://www.ub.uni-koeln.de/sammlungen/inkunabeln/index_ger.html
"Les collections" (in French). Les Dominicains – Bibliothèque patrimoniale Jacques Chirac. Retrieved 4 September 2020. https://dominicains.colmar.fr/collections
"History of the Book". The Newberry. Retrieved 4 September 2020. https://www.newberry.org/history-book
"Official Website of Casanatense Library". http://casanatense.beniculturali.it/
"Incunables (printed works, until 1501)". KB. Archived from the original on 15 April 2021. Retrieved 3 September 2020. https://web.archive.org/web/20210415005408/https://www.kb.nl/en/resources-research-guides/kb-collections/early-printed-books-until-1801/incunables-printed-works-until-1501
"Inkunabeln (Wiegendrucke)" (in German). Universitätsbibliothek Tübingen. Retrieved 3 September 2020. http://idb.ub.uni-tuebingen.de/digitue/tue/Inkunabeln
"Inkunabeln & Blockbücher" (in German). Universitäts- und Landesbibliothek Tirol. Retrieved 3 September 2020. https://www.uibk.ac.at/ulb/sondersammlungen/2.1.2.1-inkunabeln-und-blockbuecher.html
"Les incunables" (in French). Bibliothèque nationale et universitaire de Strasbourg. Retrieved 9 January 2020. https://www.bnu.fr/fr/services/nos-collections/les-incunables
"Inkunabeln" (in German). Stadtbibliothek Nürnberg. Retrieved 3 September 2020. https://www.nuernberg.de/internet/stadtbibliothek/inkunabeln.html
"Official Website of the Library". https://www.bibliotecamai.org/patrimonio-e-cataloghi/opere-a-stampa/
"Inkunabeln" (in German). Universitätsbibliothek Erlangen-Nürnberg. Retrieved 3 September 2020. https://ub.fau.de/history/inkunabeln/
"Collezioni" (in Italian). Biblioteca nazionale centrale di Roma. 23 December 2016. Retrieved 3 September 2020. http://www.bncrm.beniculturali.it/it/8/collezioni
"Early Printed Books". National Széchényi Library. Retrieved 3 September 2020. http://www.oszk.hu/en/early_printed_books
"Heidelberger Inkunabeln – digital" (in German). Universitätsbibliothek Heidelberg. Retrieved 3 September 2020. https://www.ub.uni-heidelberg.de/helios/digi/inkunabeln.html
"Official Website of Estense Library". https://gallerie-estensi.beniculturali.it/biblioteca-estense-universitaria/
"Incunaboli" (in Italian). Biblioteca Nazionale Universitaria di Torino. 19 April 2013. Retrieved 3 September 2020. http://www.bnto.librari.beniculturali.it/index.php?it/156/patrimonio
"Historische Sammlungen" (in German). Universitäts- und Landesbibliothek Sachsen-Anhalt. Retrieved 3 September 2020. https://bibliothek.uni-halle.de/sammlungen/sondersammlungen/
"Incunabula". Biblioteca Nacional de Portugal. Retrieved 4 September 2020. http://www.bnportugal.gov.pt/index.php?option=com_content&view=article&id=201&Itemid=160&lang=en
"Storia e patrimonio" (in Italian). Biblioteca Universitaria di Padova. Retrieved 9 August 2022. http://www.bibliotecauniversitariapadova.beniculturali.it/index.php?it/69/storia-e-patrimonio.it
"Alte Drucke und Rara" (in German). Zentralbibliothek Zürich. Retrieved 3 September 2020. https://www.zb.uzh.ch/de/collections/alte-drucke-und-rara
"Concise history of the monastic library". Royal Canonry of Premonstratensians at Strahov. Retrieved 16 May 2014. http://www.strahovskyklaster.cz/library/concise-history-of-the-monastic-library
"Nos collections" (in French). Bibliothèque Sainte-Geneviève. Retrieved 12 January 2021. https://www.bsg.univ-paris3.fr/iguana/www.main.cls?surl=presentation
"Collections, University Archives, Provenance Research" (in German). Universität Salzburg. Retrieved 4 September 2020. https://www.uni-salzburg.at/index.php?id=32299&L=1
"Inkunabeln: Bestand" (in German). Badische Landesbibliothek. Retrieved 3 September 2020. https://www.blb-karlsruhe.de/sammlungen/inkunabeln/bestand/
"Inkunabeln" (in German). Universitäts- und Landesbibliothek Bonn. Retrieved 3 September 2020. https://www.ulb.uni-bonn.de/de/sammlungen/inkunabeln
"Augusta" (in Italian). Biblioteca Augusta. Retrieved 5 January 2024. https://turismo.comune.perugia.it/pagine/augusta
"Catalogo alfabetico per autore degli Incunaboli - INDEX" (in Italian). University Library of Genoa. Retrieved 5 January 2024. http://www.bibliotecauniversitaria.ge.it/it/cataloghi/Incunaboli/incuna_index_0.html
"Official Website of Trivulziana Library". https://trivulziana.milanocastello.it/it/content/patrimonio
"La BmL en chiffres" (in French). Bibliothèque municipale de Lyon. Retrieved 3 September 2020. https://www.bm-lyon.fr/16-bibliotheques-et-un-bibliobus/a-propos-de-la-bibliotheque-municipale-de-lyon/article/la-bml-en-chiffres
"Historische Drucke (1450–1830)" (in German). Universitätsbibliothek Eichstätt-Ingolstadt. Retrieved 3 September 2020. https://www.ku.de/bibliothek/suchen-und-finden/sammlungen/historische-drucke
Roger Catlin (14 November 2014). "Walters Art Museum highlights the bumpy road of publishing, post-Gutenberg". The Washington Post. Retrieved 3 September 2020. https://www.washingtonpost.com/entertainment/museums/walters-art-museum-highlights-the-bumpy-road-of-publishing-post-gutenberg/2014/11/12/97ceacca-69be-11e4-a31c-77759fc1eacc_story.html
"Official Website of Verona Municipal Library". https://biblioteche.comune.verona.it/nqcontent.cfm?a_id=79983
"Fifteenth Century Printed Books at Bryn Mawr (BMC)". Tri-College Libraries. Retrieved 3 September 2020. https://guides.tricolib.brynmawr.edu/c.php?g=542610
"Official Website of the Library". https://www.bibliotecateresiana.it/index.php/patrimonio/14-le-raccolte/34-incunaboli
"Bestände" (in German). Ratsschulbibliothek Zwickau. Retrieved 3 September 2020. https://www.ratsschulbibliothek.de/de/ratsschulbibliothek/bestaende.php
"Distinctive Collections". Rare Book & Manuscript Library, University of Illinois. Retrieved 12 January 2021. https://www.library.illinois.edu/rbx/collections/distinctive-collections/
"Starodruki" (in Polish). National Library of Poland. Retrieved 14 June 2024. https://bn.org.pl/o-nas/zbiory-bn/zbiory-bn/starodruki
"Incunables de la Biblioteca Colombina" (in Spanish). Institución Colombina. Archived from the original on 23 January 2021. Retrieved 3 September 2020. https://web.archive.org/web/20210123180612/http://www.icolombina.es/colombina/incunables.htm
"Official Website of Queriniana Library". https://queriniana.comune.brescia.it/
"Official Website of the Library". http://www.bibliotecaregionalepalermo.it/index.php?it/200/patrimonio-librario-antico
"Universitätsbibliothek der Karl-Franzens-Universität Graz: Jahresbericht 2017" (PDF) (in German). Universitätsbibliothek der Karl-Franzens-Universität Graz. 2017. p. 43. Archived from the original (PDF) on 18 January 2021. Retrieved 4 September 2020. https://web.archive.org/web/20210118104212/https://public.sharepoint.uni-graz.at/sites/ub/OeffentlicheDokumente/Jahresbericht%202017%20-%20reduziert.pdf
"Official Website of the Library". https://bibliotecaangelica.cultura.gov.it/?page_id=129
"Glasgow Incunabula Project: A Catalogue of Fifteenth-century Printed Books in Glasgow". University of Glasgow. Retrieved 12 January 2021. https://www.gla.ac.uk/myglasgow/incunabula/projectintroduction/
"Official Website of University Library of Bologna". https://bub.unibo.it/it/collezioni-e-cataloghi/collezioni-speciali-manoscritti-e-libri-antichi-a-stampa
"Incunabula: Printing in Europe before 1501". Bridwell Library, Perkins School of Theology, Southern Methodist University. Retrieved 12 January 2021. https://www.smu.edu/Bridwell/SpecialCollectionsandArchives/Overview/Incunabula
"Official Website of the Library". https://www.passerinilandi.piacenza.it/sedi-e-orari/visita-la-biblioteca/ambienti-e-storia/storia
"Recherche" (in German). Stiftsbibliothek St. Gallen. Retrieved 3 September 2020. https://www.stiftsbezirk.ch/de/stiftsbibliothek/recherche/
"Official Website of the Library". https://www.bibliotecasiena.it/patrimonio/fondi-antichi-e-rari/libri-antichi-stampa
Jensen, Kristian (2003). Incunabula and Their Readers - Printing, Selling and Using Books in the Fifteenth Century. British Library. ISBN 978-0-7123-4769-3. 978-0-7123-4769-3
"British Library". https://data.cerl.org/istc/io00022300