The Eastern Alps, Including the Bavarian Highlands, Tyrol, Salzburg, Upper and Lower Austria, Styria, Carinthia, and Carniola: Handbook for Travellers. K. Baedeker, 1891. 206. https://books.google.com/books?id=vJc6AQAAIAAJ&dq=rankweil%20Frutz&pg=PA206