Üüs sölring liirbok = Friesisches Lehrbuch : Text- und Übungsbuch - Wilts, Ommo.; Gantzel, Anna, 1898-; Söl'ring Foriining e.V. (Husum : Matthiesen Verlag, 1986)
Includes index.
In Friesian and German.
Mode of access: Internet.
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Keywords: Frisian language -- Textbooks for foreign speakers; Frisian language -- Grammar; Frisian language -- Readers