Columbia subject headings:
Communists--Austria--History--20th century.
Communists--Germany--History--20th century.
World War, 1939-1945--Underground literature--France.
World War, 1939-1945--Underground movements--France.
Harvard subject headings:
Communists--Austria--History--20th century.
Communists--Germany--History--20th century.
World War, 1939-1945--Underground literature--France
World War, 1939-1945--Underground movements--France
Princeton subject headings:
Communists--Austria--History--20th century.
Communists--Germany--History--20th century.
World War, 1939-1945--Underground literature--France.
World War, 1939-1945--Underground movements--France.