Columbia subject headings:
Africa, East--Social life and customs.
Merchants--Africa, East.
Swahili-speaking peoples.
Harvard subject headings:
Africa, East--Social life and customs.
Merchants--Africa, East.
Swahili-speaking peoples.
Princeton subject headings:
Merchants--Africa, East.
Swahili-speaking peoples--Africa, East.
Swahili-speaking peoples--Social life and customs.