Columbia subject headings:
Harvard subject headings:
Anti-Nazi movement--Germany
Germany--History, Military--20th century
Germany--Politics and government--1933-1945
Hitler, Adolf, 1889-1945--Assassination attempts.
National socialism
Princeton subject headings:
Anti-Nazi movement.
Germany--History, Military--20th century.
Germany. Wehrmacht--Officers.
Hitler, Adolf, 1889-1945--Assassination attempts.
Operation Valkyrie, 1944.