Columbia subject headings:
Harvard subject headings:
Associations, institutions, etc.--Germany--Westphalia.
Charities--Germany--Westphalia.
Political clubs--Germany--Westphalia.
Professional associations--Germany--Westphalia.
Trade associations--Germany--Westphalia.
Princeton subject headings:
Associations, institutions, etc.--Germany--North Rhine-Westphalia--History--19th century.
Trade associations--Germany--North Rhine-Westphalia--History--19th century.