Columbia subject headings:
Harvard subject headings:
Africa--Economic conditions--1945-
Africa--Social conditions--1960-
Human ecology--Africa
Nature--Effect of human beings on--Africa.
Princeton subject headings:
Africa--Economic conditions--1945-1960.
Africa--Economic conditions--1960-
Africa--Social conditions--1945-1960.
Africa--Social conditions--1960-
Human ecology--Africa.
Nature--Effect of human beings on--Africa.