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Silver yield from copper ores and the effects of 64.64-cent silver on the value of copper ores produced in the United States
Consumption of primary and secondary tin in the United States in 1935
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Published Year
1930-1939 (2) *
Subject
Copper (1)
Silver (1)
Tin (1)
Author
Pehrson, Elmer Walter, (2) *
Trought, M. E. (1)
Umhau, John Bernard, (1)
