Columbia subject headings:
Harvard subject headings:
Germany. Wehrmacht. Amt Ausland/Abwehr--Sources.
Military intelligence--Germany--History--20th century--Sources.
World War, 1939-1945--Military intelligence--Germany--Sources.
Princeton subject headings:
Germany. Wehrmacht. Amt Ausland/Abwehr--Sources.
Military intelligence--Germany--History--20th century--Sources.
World War, 1939-1945--Military intelligence--Germany--Sources.