LEADER 02456oam 2200613 450 001 9910716575403321 005 20210611091828.0 035 $a(CKB)5470000002522399 035 $a(OCoLC)680246257$z(OCoLC)631644627$z(OCoLC)667882621$z(OCoLC)984765289 035 $a(OCoLC)995470000002522399 035 $a(EXLCZ)995470000002522399 100 $a20101110d1997 ua 0 101 0 $aeng 135 $aurbn||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aSurface-water quality changes after 5 years of nutrient management in the Little Conestoga Creek headwaters, Pennsylvania, 1989-91 /$fby Edward H. Koerkle and Linda C. Gustafson-Minnich ; with a section of "Benthic macroinvertebrates" by Michael D. Bilger ; prepared in cooperation with the Pennsylvania Department of Environmental Protection, Bureau of Land and Water Conservation 210 1$aLemoyne, Pennsylvania :$cU.S. Geological Survey,$d1997. 215 $a1 online resource (vii, 43 pages) $cillustrations, maps 225 1 $aWater-resources investigations report ;$v97-4048 320 $aIncludes bibliographical references (page 43). 606 $aWater quality$zPennsylvania 606 $aNutrient pollution of water$zPennsylvania 606 $aPlant nutrients$xEnvironmental aspects$zPennsylvania 606 $aNutrient pollution of water$2fast 606 $aPlant nutrients$xEnvironmental aspects$2fast 606 $aWater quality$2fast 607 $aPennsylvania$2fast 615 0$aWater quality 615 0$aNutrient pollution of water 615 0$aPlant nutrients$xEnvironmental aspects 615 7$aNutrient pollution of water. 615 7$aPlant nutrients$xEnvironmental aspects. 615 7$aWater quality. 700 $aKoerkle$b Edward H.$01407213 702 $aGustafson-Minnich$b Linda C. 702 $aBilger$b Michael D. 712 02$aGeological Survey (U.S.), 712 02$aPennsylvania.$bBureau of Land and Water Conservation. 801 0$bOCLCE 801 1$bOCLCE 801 2$bOCLCQ 801 2$bOCLCF 801 2$bOCLCQ 801 2$bOCLCO 801 2$bOCLCQ 801 2$bCOP 801 2$bOCLCA 801 2$bGPO 906 $aBOOK 912 $a9910716575403321 996 $aSurface-water quality changes after 5 years of nutrient management in the Little Conestoga Creek headwaters, Pennsylvania, 1989-91$93550119 997 $aUNINA