Columbia subject headings:
Petroleum industry and trade--Government policy--Venezuela.
Petroleum industry and trade--Venezuela.
Venezuela--Politics and government--1958-1974.
Harvard subject headings:
Petroleum industry and trade--Government policy--Venezuela
Petroleum industry and trade--Venezuela
Venezuela--Politics and government--1958-
Princeton subject headings:
Petroleum industry and trade--Government policy--Venezuela.
Petroleum industry and trade--Venezuela.
Venezuela--Politics and government--1958-.