Columbia subject headings:
Harvard subject headings:
Borderlands--Germany--Westphalia--History.
Borderlands--Netherlands--History.
Germany--Boundaries--Netherlands.
Netherlands--Boundaries--Germany.
Netherlands--History.
Westphalia (Germany)--History.
Princeton subject headings:
Germany--Boundaries--Netherlands.
Netherlands--Boundaries--Germany.
Netherlands--History.
Westphalia (Germany)--History.