Columbia subject headings:
Africa--Economic conditions.
Conservation of natural resources--Africa.
Deforestation--Africa.
Natural resources--Africa.
Wildlife conservation--Africa.
Harvard subject headings:
Africa--Economic conditions.
Africa--Foreign relations--United States.
Conservation of natural resources--Africa.
Natural resources--Africa.
United States--Foreign relations--Africa.
Princeton subject headings:
Africa--Economic conditions.
Africa--Foreign relations--United States.
Conservation of natural resources--Africa.
Natural resources--Africa.
United States--Foreign relations--Africa.