01636nam 2200421 a 450 991070170550332120120525102721.0(CKB)5470000002421048(OCoLC)794271885(EXLCZ)99547000000242104820120525d2012 ua 0engurcn|||||||||txtrdacontentcrdamediacrrdacarrierWater-quality assessment of the Cambrian-Ordovician aquifer system in the northern Midwest, United States[electronic resource] /by John T. WilsonReston, Va. :U.S. Dept. of the Interior, U.S. Geological Survey,2012.1 online resource (xvi, 154 pages) illustrations (some color), color mapsScientific investigations report ;2011-5229Title from title screen (viewed on May 25, 2012)."National Water-Quality Assessment Program."Includes bibliographical references (pages 121-129).GroundwaterQualityMiddle WestWater qualityMiddle WestAquifersMiddle WestGroundwaterQualityWater qualityAquifersWilson John T(John Thomas),1963-1397119National Water-Quality Assessment Program (U.S.)Geological Survey (U.S.)GPOGPOBOOK9910701705503321Water-quality assessment of the Cambrian-Ordovician aquifer system in the northern Midwest, United States3523561UNINA