Columbia subject headings:
Harvard subject headings:
Africa, East--Relations--Germany--Congresses.
German East Africa--History--Congresses.
Germany--Colonies--Africa, East--Congresses.
Germany--Relations--Africa, East--Congresses.
Interpersonal relations--German East Africa--Congresses.
Politics and culture--German East Africa--Congresses.
Princeton subject headings:
German East Africa--History.
Germany--Colonies--Africa, East.
Interpersonal relations--German East Africa.
Politics and culture--German East Africa.