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Mining methods and costs at metal mines of the United States

Management of labor in successful metal-mine operations

Use of airplanes in mining and petroleum operations (abstract)

Published Year

• 1930-1939 (3)

Subject

• Labor--United States (1)
• Miners--United States (1)
• Mines and mineral resources (1)
• Mines and mineral resources--United States (1)
• Petroleum (1)

Author

• Wright, Charles Will, (3) *
• Wolflin, Hugh Maupin, (1)

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