Columbia subject headings:
Germany. Militärischer Abschirmdienst--History.
Military intelligence--Germany--History.
Harvard subject headings:
Intelligence service--Germany--History.
Military intelligence--Germany--History.
Militärische Abschirmdienst--History.
National security--Germany--History.
Princeton subject headings:
Germany. Militärischer Abschirmdienst--History.
Military intelligence--Germany--History.