Columbia subject headings:
Communism--Europe--History.
Communists--Biography.
Dahlem, Franz, 1892-1981.
Harvard subject headings:
Communism--Europe--History
Communists--Biography
Dahlem, Franz, 1892-
Princeton subject headings:
Communism--Europe--History.
Communists--Biography.
Dahlem, Franz, 1892-1981.