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100   $a20101115d1997      ua             0
101 0 $aeng
135   $aurbn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aTrends in nutrient concentration and load for streams in the Mississippi River Basin, 1974-94 /$fby D.L. Lurry and D.D. Dunn ; prepared in cooperation with the U.S. Environmental Protection Agency, Gulf of Mexico Program, Nutrient Enrichment Issue Committee
210  1$aAustin, Texas :$cU.S. Geological Survey,$d1997.
215   $a1 online resource (iv, 62 pages) $cillustrations, maps here
225 1 $aWater-resources investigations report ;$v97-4223
320   $aIncludes bibliographical references (pages 21-22).
606   $aNutrient pollution of water$zMississippi River Valley
606   $aWater$xPhosphorus content$zMississippi River Valley
606   $aWater$xNitrogen content$zMississippi River Valley
606   $aNutrient pollution of water$2fast
606   $aWater$xNitrogen content$2fast
606   $aWater$xPhosphorus content$2fast
607   $aMississippi River Valley$2fast
615  0$aNutrient pollution of water
615  0$aWater$xPhosphorus content
615  0$aWater$xNitrogen content
615  7$aNutrient pollution of water.
615  7$aWater$xNitrogen content.
615  7$aWater$xPhosphorus content.
700   $aLurry$b Dee L.$01415410
702   $aDunn$b David D.
712 02$aGeological Survey (U.S.),
712 02$aGulf of Mexico Program (U.S.).$bNutrient Enrichment Committee.
801  0$bOCLCE
801  1$bOCLCE
801  2$bOCLCQ
801  2$bOCLCF
801  2$bOCLCO
801  2$bOCLCQ
801  2$bCOP
801  2$bGPO
906   $aBOOK
912   $a9910716575103321
996   $aTrends in nutrient concentration and load for streams in the Mississippi River Basin, 1974-94$93540373
997   $aUNINA