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Limestone.

Patents on geophysical prospecting issued in the United States, England, Canada, Australia, Germany, France, and Russia

The design of small wooden head frames

Published Year

• 1930-1939 (3) *

Subject

• Prospecting (3) *
• Geophysics (1)
• Limestone (1)
• Limestone industry--United States--History (1)
• Mining engineering (1)

Author

• Ayvazoglou, W. (1)
• Bowles, Oliver, (1)
• Staley, W. W. (1)

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