Columbia subject headings:
Low German language--Societies, etc.--Periodicals.
Low German literature--Bio-bibliography--Periodicals.
Harvard subject headings:
Low German language--Societies, etc.--Periodicals.
Low German literature--Bio-bibliography--Periodicals.
Princeton subject headings:
Low German language--Societies, etc.--Periodicals.
Low German literature--Bio-bibliography--Periodicals.
Periodicals.