A study of falls of roof and coal in mines of Harrison County, West Virginia / by J.W. Paul and G.N. Geyer.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
[Washington, D.C.] :
United States Bureau of Mines,
1931.
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| Series: | Report of investigations (United States. Bureau of Mines) ;
3110. |
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| Physical Description: | 30 pages : illustrations ; 27 cm. |
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