Columbia subject headings:
Angola--Economic conditions--1975---Periodicals.
Sao Tome and Principe--Economic conditions--Periodicals.
Harvard subject headings:
Angola--Economic conditions--1975---Periodicals.
Angola--Politics and government--1975---Periodicals.
Sao Tome and Principe--Economic conditions--Periodicals.
Sao Tome and Principe--Politics and government--Periodicals.
Princeton subject headings:
Angola--Economic conditions--1975---Periodicals.
Sao Tome and Principe--Economic conditions--Periodicals.
Sao Tome and Principe--Politics and government--Periodicals.