Columbia subject headings:
Harvard subject headings:
Anti-Nazi movement--Germany--Congresses
Germany--History--1933-1945--Congresses.
Hitler, Adolf, 1889-1945--Assassination attempt, 1944 (July 20)--Congresses.
Princeton subject headings:
Anti-Nazi movement--Germany--Congresses.
Germany--History--1933-1945--Congresses.
Hitler, Adolf, 1889-1945--Assassination attempt, 1944 (July 20)--Congresses.