Columbia subject headings:
Harvard subject headings:
Diplomats--Switzerland--Correspondence.
Germany (East)--Foreign relations--Germany (West)--Sources.
Germany (East)--Foreign relations--Sources.
Germany (East)--Politics and government--20th century--Sources.
Germany (West)--Foreign relations--Germany (East)--Sources.
Princeton subject headings:
Diplomats--Switzerland--Correspondence.
Germany (East)--Foreign relations--Germany (West)--Sources.
Germany (East)--Foreign relations--Sources.
Germany (East)--Politics and government--Sources.
Germany (West)--Foreign relations--Germany (East)--Sources.