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Good rock-dusting and ventilation practice in two Alabama coal mines
Report on Dolomite and Mulga mines, about 16 mi southwest of Birmingham; both mines are gassy.
Good rock-dusting and ventilation practice in two Alabama coal mines
Report on Dolomite and Mulga mines, about 16 mi southwest of Birmingham; both mines are gassy.
Good rock-dusting and ventilation practice in two Alabama coal mines
U S Bur Mines -- Information Cir
Cash, F.E. (author)
1932
12 pages
Supp plates
Report
English
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|Rock dusting and sampling including wet rock dusting, at bureau of mines experimental coal mine
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|