Columbia subject headings:
Africa, West--Colonial influence.
Africa, West--Commerce--History.
Europe--Colonies--Africa.
Harvard subject headings:
Europe--Colonies--Africa--History.
Guinea-Bissau--Commerce--History.
Senegambia--Commerce--History.
Princeton subject headings:
Europe--Colonies--Africa--History.
Guinea-Bissau--Commerce--History.
Senegambia--Commerce--History.