Columbia subject headings:
Languages in contact.
Low German language--Dialects--Germany--Westphalia.
Low German language--Dialects--Netherlands.
Harvard subject headings:
Languages in contact.
Low German language--Dialects--Germany--Westphalia.
Low German language--Dialects--Netherlands.
Princeton subject headings:
Languages in contact.
Low German language--Dialects--Germany, West--Westphalia.
Low German language--Dialects--Netherlands.