01452oam 2200445 450 991071192840332120190314080045.0(CKB)5470000002488810(OCoLC)1041735575(OCoLC)995470000002488810(EXLCZ)99547000000248881020180622d1987 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierCore index a numerical core-logging procedure for estimating rock quality /by John R. Ege[Reston, Virginia] :Department of the Interior, U.S. Geological Survey,1987.1 online resource (iii, 15 pages) illustrationsU.S. Geological Survey Circular ;954Title from title screen (viewed June 22, 2018)"Procedures to be followed for rapid characterization of rock quality."Includes bibliographical references (page 15).Core index Drill core analysisDrill core analysisfastDrill core analysis.Drill core analysis.Ege John R.1386675Geological Survey (U.S.),COPCOPOCLCOOCLCFGPOBOOK9910711928403321Core index3545044UNINA