Columbia subject headings:
Harvard subject headings:
Germany--Politics and government--1933-1945.
Heads of state--Germany--Biography.
Hitler, Adolf, 1889-1945--Assassination attempt, 1944 (July 20)
Princeton subject headings:
Germany--Politics and government--1933-1945.
Heads of state--Germany--Biography.
Hitler, Adolf, 1889-1945--Assassination attempts.