Columbia subject headings:
Copper industry and trade--Zambia.
Copper miners--Zambia.
Wages--Copper miners--Zambia.
Zambia--Economic conditions.
Harvard subject headings:
Copper industry and trade--Zambia.
Copper miners--Zambia.
Wages--Copper miners--Zambia.
Zambia--Economic conditions.
Princeton subject headings:
Copper industry and trade--Zambia.
Copper miners--Zambia.
Wages--Copper miners--Zambia.
Zambia--Economic conditions--1964-