This is a scetch of the isoglosses map in the book:
Höskuldur Thráinsson, Hjalmar P. Petersen, Jógvan í Lon Jacobsen, Zakaris Svabo Hansen: Faroese. An Overview and Reference Grammar Tórshavn: Føroya Fróðskaparfelag 2004 ISBN99918-41-85-7 (p. 368 "Based on the work by Eivind Weyhe")
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