Columbia subject headings:
Mineral industries--South Africa--Bibliography.
South Africa--Strategic aspects--Bibliography.
Strategic materials--South Africa--Bibliography.
Harvard subject headings:
Chromium industry--South Africa--Bibliography.
Manganese industry--South Africa--Bibliography.
Metal trade--South Africa--Bibliography.
Platinum group industry--South Africa--Bibliography.
South Africa--Commerce--Bibliography.
Strategic materials--South Africa--Bibliography.
Vanadium industry--South Africa--Bibliography.
Princeton subject headings:
Mineral industries--South Africa--Bibliography.
South Africa--Strategic aspects--Bibliography.
Strategic materials--South Africa--Bibliography.