01272nam 2200385 450 991070442290332120130327095053.0(CKB)5470000002441469(OCoLC)832709152(EXLCZ)99547000000244146920130327d2011 ua 0engurcn|||||||||txtrdacontentcrdamediacrrdacarrierNational Aquatic Resource Surveys an update[Washington, D.C.] :United States Environmental Protection Agency,2011.1 online resource (2 pages) color illustrationsTitle from title screen (viewed on Mar. 27, 2013)."January 2011."National Aquatic Resource Surveys Hydrological surveysUnited StatesWater qualitySamplingWater qualityUnited StatesMeasurementHydrological surveysWater qualitySampling.Water qualityMeasurement.United States.Environmental Protection Agency,GPOGPOBOOK9910704422903321National Aquatic Resource Surveys3450146UNINA