02056oam 2200481 a 450 991069688370332120080925161817.0(CKB)5470000002382042(OCoLC)228024727(EXLCZ)99547000000238204220080513d2007 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierEffects of hardened low-water crossings on periphyton and water quality in selected streams at the Fort Polk Military Reservation, Louisiana, 1998-99 and 2003-04[electronic resource] /by Barbara W. Bryan ... [and others] ; in cooperation with the U.S. Army Joint Readiness Training Center and Fort Polk[Version 1.0].Reston, Va. :U.S. Dept. of the Interior, U.S. Geological Survey,2007.v, 36 pages digital, PDF fileScientific investigations report ;2007-5279Title from PDF title screen (viewed on May 12, 2008).Includes bibliographical references (pages 35-36).Effects of hardened low water crossings on periphyton and water qualityWater qualityLouisianaFort PolkWaterPollutionLouisianaFort PolkPeriphytonLouisianaFort PolkRoadsEnvironmental aspectsLouisianaFort PolkWater qualityWaterPollutionPeriphytonRoadsEnvironmental aspectsBryan Barbara W1396634Fort Polk (La.)United States.Department of the Army.Joint Readiness Training Center.Geological Survey (U.S.)GISGISGPOBOOK9910696883703321Effects of hardened low-water crossings on periphyton and water quality in selected streams at the Fort Polk Military Reservation, Louisiana, 1998-99 and 2003-043522647UNINA