Columbia subject headings:
Frisian language--Dialects--Dictionaries--German language.
German language--Dictionaries--Friesian language.
Harvard subject headings:
Princeton subject headings:
Frisian language--Dialects--Germany (West)--Langenhorn (Hamburg).
Frisian language--Dialects--Germany (West)--Ockholm.
Frisian language--Dictionaries--German.
German language--Dictionaries--Friesian.