International Conference on Minority Languages (4th : 1989 : Leeuwarden, Netherlands) (1990). Fourth International Conference on Minority Languages. Multilingual Matters. pp. 25–30. ISBN 1853591041. OCLC 21600047.{{cite book}}: CS1 maint: numeric names: authors list (link) 1853591041
International Conference on Minority Languages (4th : 1989 : Leeuwarden, Netherlands) (1990). Fourth International Conference on Minority Languages. Multilingual Matters. pp. 25–30. ISBN 1853591041. OCLC 21600047.{{cite book}}: CS1 maint: numeric names: authors list (link) 1853591041