Columbia subject headings:
Economic history--1971-1990.
Imperialism.
International economic relations.
Marxian economics.
Nonrenewable natural resources.
Raw materials.
Harvard subject headings:
Economic history--1971-1990
Imperialism.
International economic relations.
Marxian economics.
Nonrenewable natural resources.
Raw materials.
Princeton subject headings:
Economic history--1971-1990.
Imperialism.
International economic relations.
Marxian economics.
Nonrenewable natural resources.
Raw materials.