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State laws relating to coal-mine timbering

A study of falls of roof and coal in mines in the number 8 field of eastern Ohio

A study of falls of roof and coal in mines of Harrison County, West Virginia

Timber withdrawing and devices used for this purpose in some coal mines

Published Year

• 1920-1929 (1)
• 1930-1939 (3)

Subject

• Coal mines and mining (4) *
• Mine timbering (4) *
• Mining law (1)

Author

• Paul, J. W. (4)
• Calverley, Joseph Gladstone, (1)
• Geyer, J. N. (1)
• Geyer, John Nicholas, (1)
• Plein, L. N. (1)

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