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A study of falls of roof and coal in Northern Colorado

A study of falls of roof and coal, Rock Springs Coal District, Sweetwater County, Wyo.

Published Year

• 1930-1939 (2)

Subject

• Mine roof control (2) *
• Mine timbering (2)
• Mine accidents--Colorado (1)
• Mine accidents--Wyoming (1)

Author

• Tomlinson, Herbert. (2) *

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