Columbia subject headings:
Harvard subject headings:
Czechoslovakia--Foreign relations--Germany (East)--Congresses.
Czechoslovakia--History--1945-1992--Congresses.
Germany (East)--Foreign relations--Czechoslovakia--Congresses.
Germany (East)--History--Congresses.
Princeton subject headings:
Czechoslovakia--Foreign relations--Germany (East)--Congresses.
Czechoslovakia--History--1945-1992--Congresses.
Germany (East)--Foreign relations--Czechoslovakia--Congresses.
Germany (East)--History--Congresses.