Columbia subject headings:
Fackenheim, Paul Ernst, 1892-
Jews--Germany--Biography.
Spies--Germany--Biography.
World War, 1939-1945--Secret service--Germany.
Harvard subject headings:
Fackenheim, Paul Ernst, 1892-
Jews--Germany--Biography.
Spies--Germany--Biography.
World War, 1939-1945--Secret service--Germany.
Princeton subject headings:
Fackenheim, Paul Ernst, 1892-
Jews--Germany--Biography.
Spies--Germany--Biography.
World War, 1939-1945--Secret service--Germany.