01265nam 2200361Ka 450 991069672770332120080716085400.0(CKB)5470000002381597(OCoLC)234073208(EXLCZ)99547000000238159720080716d1981 ua 0engtxtrdacontentcrdamediacrrdacarrierEvaluation of the seismic system for locating trapped miners[electronic resource] /by John Durkin and Roy J. Greenfield[Washington, D.C..?] :U.S. Dept. of the Interior, Bureau of Mines,[1981]iii, 55 pages digital, PDF fileReport of investigations ;8567Title from title screen (viewed on July 14, 2008).SeismometersMine rescue workEquipment and suppliesSeismometers.Mine rescue workEquipment and supplies.Durkin John1391019Greenfield Roy1400631United States.Bureau of Mines.GPOGPOBOOK9910696727703321Evaluation of the seismic system for locating trapped miners3467896UNINA