Columbia subject headings:
Harvard subject headings:
Admirals--Germany--Biography
Anti-Nazi movement--Biography
Canaris, Wilhelm, 1887-1945.
Military intelligence--Germany--History--20th century.
World War, 1939-1945--Secret service--Germany.
Princeton subject headings:
Anti-Nazi movement--Biography.
Canaris, Wilhelm, 1887-1945.
Hitler, Adolf, 1889-1945.
World War, 1939-1945--Secret service--Germany.