Columbia subject headings:
Germany--Politics and government--20th century--Congresses.
Totalitarianism--History--20th century--Congresses.
Totalitarianism--Philosophy--Congresses.
Harvard subject headings:
Germany--Politics and government--20th century--Congresses.
Totalitarianism--History--20th century--Congresses.
Totalitarianism--Philosophy--Congresses.
Princeton subject headings:
Germany--Politics and government--20th century--Congresses.
Totalitarianism--History--20th century--Congresses.
Totalitarianism--Philosophy--Congresses.