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EZ-Up curtain stoppings a practical solution for directing ventilation airflows in large-opening met

[Pittsburgh, PA] : U.S. Dept. of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, [2006] 2006

Re-issue P01-06 diesel particulate matter in underground coal mines--training program guide.

[Arlington, Va. : U.S. Dept. of Labor, Mine Safety and Health Administration, 2010] 2010

Reissue of P02-07 compliance with diesel particulate matter standard in underground coal mines.

[Arlington, Va. : U.S. Dept. of Labor, Mine Safety and Health Administration, 2011] 2011

Reissue of P03-15 compliance with diesel particulate matter standard in underground coal mines for n

[Arlington, Va. : U.S. Dept. of Labor, Mine Safety and Health Administration, 2011] 2011

Super stopping a permanent solid stopping for directing ventilation airflows in large-opening metal/

[Pittsburgh, PA] : U.S. Dept. of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, [2006] 2006

Underground coal mine methane recovery and use opportunities

[Washington, D.C. : U.S. Environmental Protection Agency, 2008] 2008

Ventilation of a 40-foot, two-pass, extended cut

[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, [1998] 1998