01259nam 2200349Ka 450 991069682980332120080728120523.0(CKB)5470000002382586(OCoLC)236169340(EXLCZ)99547000000238258620080728d1975 ua 0engtxtrdacontentcrdamediacrrdacarrierSelected geologic factors affecting mining of the Pittsburgh coalbed[electronic resource] /by C.M. McCulloch ... [and others][Pittsburgh, Pa.?] :U.S. Dept. of the Interior, Bureau of Mines,[1975]iii, 72 pages digital, PDF fileReport of investigations ;8093Title from title screen (viewed on July 28, 2008).Coal mines and miningPennsylvaniaCoal mines and miningWest VirginiaCoal mines and miningCoal mines and miningMcCulloch C. M(Charles M.)1389497United States.Bureau of Mines.GPOGPOBOOK9910696829803321Selected geologic factors affecting mining of the Pittsburgh coalbed3497475UNINA