Columbia subject headings:
Africa, East--History.
Congo (Brazzaville)--History.
Congo--History.
Guinea (Region)--History.
Guinea--History.
Slave trade--Africa.
Harvard subject headings:
Africa, East--History.
Africa, Eastern--History.
Africa, West--History--To 1884.
Congo (Brazzaville)--History.
Guinea--History.
Slave trade--Africa
Slave trade--Africa, Eastern--History.
Slave trade--Africa, West--History
Princeton subject headings: