Columbia subject headings:
Germany--History--1918-1933--Congresses.
Germany--History--1933-1945--Congresses.
Harvard subject headings:
Germany--History--1918-1933--Congresses.
Germany--History--1918-1933.
Germany--History--1933-1945--Congresses.
Germany--History--1933-1945.
Princeton subject headings:
Germany--Civilization.
Germany--History--1918-1933.
Germany--History--1933-1945.