Columbia subject headings:
Gays--Nazi persecution--Congresses.
Internment camp inmates--Germany--Congresses.
Nazi concentration camp inmates--Germany--Congresses.
Harvard subject headings:
Concentration camp inmates--Germany--Congresses.
Gays--Nazi persecution--Congresses.
Princeton subject headings:
Gays--Nazi persecution--Congresses.
Nazi concentration camp inmates--Germany--Congresses.