Columbia subject headings:
Dutch language--Dialects--Netherlands--Gelderland.
Gelderland (Netherlands)--Languages--History--18th century.
Gelderland (Netherlands)--Languages--History--19th century.
German language--Dialects--Netherlands--Gelderland.
Languages in contact--Netherlands--Gelderland--History--18th century.
Languages in contact--Netherlands--Gelderland--History--19th century.
Harvard subject headings:
Dutch language--Dialects--Netherlands--Gelderland.
Dutch language--Germany--North Rhine-Westphalia.
Gelderland (Netherlands)--Languages--History--18th century.
Gelderland (Netherlands)--Languages--History--19th century.
German language--Dialects--Netherlands--Gelderland.
Languages in contact--Germany--North Rhine-Westphalia--History--18th century.
Languages in contact--Netherlands--Gelderland--History--18th century.
Languages in contact--Netherlands--Gelderland--History--19th century.
Princeton subject headings:
German language--Dialects--Germany (West)--Rheinland-Pfalz.
German language--History.