Columbia subject headings:
Benin--Colonial influence--History.
Benin--Economic conditions.
Benin--Foreign economic relations.
Slave trade--Benin--History.
Harvard subject headings:
Benin--Colonial influence--History.
Benin--Economic conditions.
Benin--Foreign economic relations.
Slave trade--Benin--History.
Princeton subject headings:
Benin--Colonial influence--History.
Benin--Economic conditions.
Benin--Foreign economic relations.
Slave trade--Benin--History.