Columbia subject headings:
Harvard subject headings:
Germany--Foreign relations--1918-1933--Congresses.
Germany--History--1918-1933--Congresses.
Germany--Politics and government--1918-1933--Congresses.
International law--History--20th century--Congresses.
Princeton subject headings:
Germany--History--1918-1933.
Germany--Politics and government--1918-1933.
International cooperation.
International law.