Columbia subject headings:
Bauer, Leo, 1912-1972.
Communists--Germany--Biography.
Socialists--Germany--Biography.
Harvard subject headings:
Bauer, Leo, 1912-
Bauer, Leo, 1912-1972.
Communists--Germany--Biography
Socialists--Germany--Biography
Princeton subject headings:
Bauer, Leo, 1912-1972.
Communists--Germany--Biography.
Socialists--Germany--Biography.