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Trends in the minerals industry, 1970

Technologic trends in the minerals industry, 1971

Technologic and related trends in the mineral industries, 1972

The importance of minerals, 1976.

Published Year

• 1970-1979 (4) *

Subject

• Mineral industries--United States (4) *
• Mineral industries--Technology (1)
• Mines and mineral resources--United States (1)
• Mines and mineral resources--United States--History--Pictorial works (1)

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