01645nam 2200385 a 450 991070225650332120121114121708.0(CKB)5470000002425583(OCoLC)817953527(EXLCZ)99547000000242558320121114d2012 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierA benthic-macroinvertebrate index of biotic integrity and assessment of conditions in selected streams in Chester County, Pennsylvania, 1998-2009[electronic resource] /by Andrew G. Reif ; prepared in cooperation with the Chester County Water Resources AuthorityReston, Va. :U.S. Dept. of the Interior, U.S. Geological Survey,2012.1 online resource (viii, 41 pages) illustrations (some color), color mapsScientific investigations report ;2011-5116Title from title screen (viewed on Nov. 14, 2012).Includes bibliographical references (pages 36-38).Water qualityPennsylvaniaChester CountyBenthosPennsylvaniaChester CountyWater qualityBenthosReif Andrew G1397983Chester County Water Resources Authority.Geological Survey (U.S.)GPOGPOBOOK9910702256503321A benthic-macroinvertebrate index of biotic integrity and assessment of conditions in selected streams in Chester County, Pennsylvania, 1998-20093517908UNINA