01429nam 2200361Ka 450 991069688730332120080722101103.0(CKB)5470000002382005(OCoLC)234381248(EXLCZ)99547000000238200520080722d1999 ua 0engtxtrdacontentcrdamediacrrdacarrierEvaluation of reinforced cementitious seals[electronic resource] /Eric S. Weiss ... [and others]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,[1999]ii, 35 pages digital, PDF fileReport of investigations ;9647Title from title screen (viewed on July 18, 2008)."August 1999."Concrete stoppings (Mining)TestingSealing (Technology)Concrete stoppings (Mining)Testing.Sealing (Technology)Weiss E. S(Eric S.)1386102Pittsburgh Research Laboratory (National Institute for Occupational Safety and Health)GPOGPOBOOK9910696887303321Evaluation of reinforced cementitious seals3499450UNINA