Columbia subject headings:
Harvard subject headings:
Germany (East)--Economic conditions--Congresses.
Germany (East)--History--Congresses.
Germany (East)--Politics and government--Congresses.
Germany (East)--Relations--Germany (West)--Congresses.
Germany (East)--Social conditions--Congresses.
Germany (West)--Relations--Germany (East)--Congresses.
Princeton subject headings:
Germany (East)--History--Congresses.
Germany (East)--Politics and government--Congresses.
Germany (East)--Relations--Germany (West)--Congresses.
Germany (West)--Relations--Germany (East)--Congresses.