01337nam 2200349Ka 450 991069527600332120060804164146.0(CKB)5470000002367978(OCoLC)70834873(EXLCZ)99547000000236797820060804d2006 ua 0engtxtrdacontentcrdamediacrrdacarrierGreat river ecosystems field operations manual[electronic resource] environmental monitoring and assessment program[Washington, D.C.] :United States Environmental Protection Agency, Office of Research and Development,[2006]227 pages digital, PDF fileTitle from title screen (viewed on Aug. 4, 2006)."http://www.epa.gov/emfjulte/greatriver/EMAPGREFOM.pdf.""EPA/620/R-06/002."Includes bibliographical references.Great river ecosystems field operations manual RiversMonitoringUnited StatesRiversMonitoringUnited States.Environmental Protection Agency.Office of Research and Development.GPOGPOBOOK9910695276003321Great river ecosystems field operations manual3431180UNINA