Columbia subject headings:
Harvard subject headings:
Germany (East)--Foreign relations--Tanzania--Zanzibar.
Germany (East)--Foreign relations--Tanzania.
Tanzania--Foreign relations--Germany (East)
Zanzibar--Foreign relations--Germany (East)
Princeton subject headings:
Germany (East)--Relations--Tanzania.
Germany (East)--Relations--Zanzibar.
Tanzania--Relations--Germany (East).
Zanzibar--Relations--Germany (East).