01245nam 2200349Ka 450 991069672430332120080716100321.0(CKB)5470000002381631(OCoLC)234072415(EXLCZ)99547000000238163120080716d1984 ua 0engtxtrdacontentcrdamediacrrdacarrierA short-range locator system for detecting trapped miners[electronic resource] /by William E. Webb ... [and others][Washington, D.C.?] :U.S. Dept. of the Interior, Bureau of Mines,[1984]ii, 22 pages digital, PDF fileReport of investigations ;8844Title from title screen (viewed on July 15, 2008).Mine rescue workEquipment and suppliesMine communication systemsMine rescue workEquipment and supplies.Mine communication systems.Webb William E1399512United States.Bureau of Mines.GPOGPOBOOK9910696724303321A short-range locator system for detecting trapped miners3464790UNINA