Columbia subject headings:
Canaris, Wilhelm, 1887-1945.
Germany--History--1933-1945.
Military intelligence--Germany--History--20th century.
World War, 1939-1945--Secret service--Germany.
Harvard subject headings:
Canaris, Wilhelm, 1887-1945.
Germany--History--1933-1945.
Military intelligence--Germany--History--20th century.
World War, 1939-1945--Secret service--Germany.
Princeton subject headings:
Canaris, Wilhelm, 1887-1945.
Germany--History--1933-1945.
Military intelligence--Germany--History--20th century.
World War, 1939-1945--Secret service--Germany.