Falls of roof and coal in mines operating in the Pittsburgh Coal Bed, Panhandle District, West Virginia / by J.W. Paul and J.N. Geyer.
|Main Author:||Paul, James Washington.|
|Other Authors:||Geyer, John Nicholas, 1896-|
Washington, D.C. : U.S.Bureau of Mines, 1932.
Coal mine accidents.
Coal mines and mining > West Virginia.
At head of title: U.S. Department of Commerce, R.P. Lamont, secretary. Bureau of Mines. Scott Turner, director ...
ii, 34 p. :
illus., map, tables, diagr. ;
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