02081oam 2200589I 450 991071164940332120181211073352.0(CKB)5470000002485568(OCoLC)953258873(OCoLC)944376854(OCoLC)995470000002485568(EXLCZ)99547000000248556820160708d1951 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierExploratory drilling in the Prairie du Chien group of the Wisconsin zinc-lead district by the U.S. Geological Survey in 1949-1950 /by Allen V. Heyl, Jr., Erwin J. Lyons, and Allen F. Agnew. ; prepared in cooperation with the Wisconsin Geological and Natural History SurveyWashington, D.C. :United States Department of the Interior, Geological Survey,1951.1 online resource (i, 35 pages) illustrations, mapsGeological Survey circular ;131"November 1951."Includes bibliographical references (page 16).BoringsWisconsinLead oresWisconsinZinc oresWisconsinBoringsfastLead oresfastZinc oresfastWisconsinfastBoringsLead oresZinc oresBorings.Lead ores.Zinc ores.Heyl Allen V(Allen Van),1918-2008,1387333Agnew Allen F.1918-2012,Lyons Erwin J.Geological Survey (U.S.),Wisconsin Geological and Natural History Survey.COPCOPOCLCOOCLCFOCLCEOCLCAGPOBOOK9910711649403321Exploratory drilling in the Prairie du Chien group of the Wisconsin zinc-lead district by the U.S. Geological Survey in 1949-19503453904UNINA