Evaluation of explosion-resistant seals, stoppings, and overcast for ventilation control in underground coal mining
|Format:||Government Document Online Book|
Pittsburgh, Pa. :
U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory,
|Series:||Report of investigations (National Institute for Occupational Safety and Health) ;
|Online Access:||ONLINE VERSION|
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