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Trends in the minerals industry, 1970
Technologic and related trends in the mineral industries, 1972
Technologic trends in the minerals industry, 1971
The importance of minerals, 1976.
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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)
