Columbia subject headings:
Harvard subject headings:
Homosexuality--Germany--Hamburg--History--20th century--Exhibitions.
Law enforcement--Germany--Hamburg--History--20th century--Exhibitions.
Police--Germany--Hamburg--History--20th century--Exhibitions.
Princeton subject headings:
Homosexuality--Germany--Hamburg--History--20th century--Exhibitions.
Law enforcement--Germany--Hamburg--History--20th century--Exhibitions.
Police--Germany--Hamburg--History--20th century--Exhibitions.