Columbia subject headings:
Anti-Nazi movement--Germany--History--Sources.
Hitler, Adolf, 1889-1945--Assassination attempts--Sources.
Harvard subject headings:
Anti-Nazi movement--Germany--History--Sources.
Hitler, Adolf, 1889-1945--Assassination attempt, 1944 (July 20)--Sources.
Princeton subject headings:
Anti-Nazi movement--Germany--Sources.
Hitler, Adolf, 1889-1945--Assassination attempt, 1944 (July 20)--Sources.