Mine gases and ventilation :
Beard, James T. 1855-
Mine gases and ventilation : textbook for students of mining, mining engineers and candidates preparing for mining examinations designed for working out the various problems that arise in the practice of coal mining, as they relate to the safe and effecient operation of mines / by James T. Beard. - 2d ed., rev. and enl. - New York : McGraw-Hill, c1920. - xii, 433 p. : front., illus. ; 32 cm.
Mine ventilation.
Mine gases.
Coal mines and mining.
622.42 / BEM
Mine gases and ventilation : textbook for students of mining, mining engineers and candidates preparing for mining examinations designed for working out the various problems that arise in the practice of coal mining, as they relate to the safe and effecient operation of mines / by James T. Beard. - 2d ed., rev. and enl. - New York : McGraw-Hill, c1920. - xii, 433 p. : front., illus. ; 32 cm.
Mine ventilation.
Mine gases.
Coal mines and mining.
622.42 / BEM