Columbia subject headings:
Germany--History--1945-1990--Congresses.
Germany--History--1990---Congresses.
Germany--Politics and government--1945-1990--Congresses.
Germany--Politics and government--1990---Congresses.
Harvard subject headings:
Germany--Historiography--Congresses.
Germany--History--20th century--Congresses.
Princeton subject headings:
Germany--History--1945-1990--Congresses.
Germany--History--1990---Congresses.
Germany--Politics and government--1945-1990--Congresses.
Germany--Politics and government--1990---Congresses.