Columbia subject headings:
Mexico--Economic policy--1970-1994.
Norway--Economic policy.
Petroleum industry and trade--Government policy--Mexico.
Petroleum industry and trade--Government policy--Norway.
Harvard subject headings:
Mexico--Economic policy--1970-1994.
Norway--Economic policy.
Petroleum industry and trade--Government policy--Mexico
Petroleum industry and trade--Government policy--Norway.
Princeton subject headings:
Mexico--Economic policy--1970-1994.
Norway--Economic policy.
Petroleum industry and trade--Government policy--Mexico.
Petroleum industry and trade--Government policy--Norway.