Columbia subject headings:
Mineral industries--Political aspects--United States.
Strategic materials--Government policy--United States.
United States--Foreign economic relations.
Harvard subject headings:
Mineral industries--Political aspects--United States.
Strategic materials--Government policy--United States
United States--Foreign economic relations.
Princeton subject headings:
Mineral industries--Political aspects--United States.
Strategic materials--Government policy--United States.
United States--Foreign economic relations.