Falls of roof and coal in mines operating in the Pittsburgh coal bed in Marion and Monongalia counties, W. Va. /
by J.W. Paul and J.N. Geyer.
Description
- Language(s)
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English
- Published
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Washington, D.C. : U.S.Bureau of Mines, 1932.
- Note
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At head of title: U.S. Department of Commerce, R.P. Lamont, secretary. Bureau of Mines. Scott Turner, director ...
- Physical Description
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ii, 43 p. :
illus., map, tables, diagr. ;
23 cm.
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