Columbia subject headings:
Harvard subject headings:
Anti-Nazi movement--Germany
Germany. Heer. Generalstab--Biography.
Hitler, Adolf, 1889-1945--Assassination attempt, 1944 (July 20)
Tresckow, Henning von, 1901-1944.
Princeton subject headings:
Generals--Germany.
Germany. Wehrmacht--Officers.
Hitler, Adolf, 1889-1945--Assassination attempts.
Tresckow, Henning von, 1901-1944.