Columbia subject headings:
Coffee industry--Tanzania--To 1964.
Coffee plantation workers--Tanzania--Economic conditions--To 1964.
Germany--Colonies--Africa, East--Economic conditions.
Haya (African people)--Economic conditions--To 1964.
Tanzania--Economic conditions--To 1964.
Harvard subject headings:
Coffee industry--Tanzania.
Coffee plantation workers--Tanzania--Economic conditions.
Germany--Colonies--Africa--Economic conditions.
Haya (African people)--Economic conditions.
Tanzania--Economic conditions--To 1964.
Princeton subject headings:
Coffee industry--Tanzania.
Coffee plantation workers--Tanzania--Economic conditions.
Germany--Colonies--Africa, East--Economic conditions.
Haya (African people)--Economic conditions.
Tanzania--Economic conditions--To 1964.