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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

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)

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