01587nam 2200433Ia 450 991069003430332120021101114913.0(CKB)5470000002334921(OCoLC)31197227ocm31197227(OCoLC)995470000002334921(EXLCZ)99547000000233492119940929d1994 ua 0engtxtrdacontentnrdamediancrdacarrierNonpoint and point sources of nitrogen in major watersheds of the United States /by Larry J. PuckettReston, Va. :U.S. Geological Survey ;Denver, CO :USGS Earth Science Information Center, Open-File Reports Section [distributor],1994.9 pages illustrations, maps ;28 cmWater-resources investigations report ;94-4001Includes bibliographical references (page 9).Nonpoint source pollutionUnited StatesWaterNitrogen contentUnited StatesWaterPollutionUnited StatesPoint source identificationNonpoint source pollutionWaterNitrogen contentWaterPollutionPoint source identification.Puckett Larry J1381431Geological Survey (U.S.)GISGISSZZAGLGPOBOOK9910690034303321Nonpoint and point sources of nitrogen in major watersheds of the United States3424040UNINA