Columbia subject headings:
Harvard subject headings:
Africa--Economic conditions--1960---Handbooks, manuals, etc.
Africa--History--Handbooks, manuals, etc.
Africa--Politics and government--1960---Handbooks, manuals, etc.
Africa--Social conditions--1960---Handbooks, manuals, etc.
Princeton subject headings:
Africa--Economic conditions--1960---Handbooks, manuals, etc.
Africa--History--Handbooks, manuals, etc.
Africa--Politics and government--1960---Handbooks, manuals, etc.
Africa--Social conditions--1960---Handbooks, manuals, etc.