Columbia subject headings:
Harvard subject headings:
Germany (East)--Foreign relations--Germany (West)--Congresses.
Germany (West)--Foreign relations--Germany (East)--Congresses.
Honecker, Erich--Travel--Germany--Bonn--Congresses.
Visits of state--Germany--Bonn--Congresses.
Princeton subject headings:
Germany (East)--Foreign relations--Germany (West)--Congresses.
Germany (West)--Foreign relations--Germany (East)--Congresses.
Honecker, Erich--Travel--Germany (West)--Congresses.
Visits of state--Germany (West)--Congresses.