Effects 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 ... [et al.] ; in cooperation with the U.S. Army Joint Readiness Training Center and Fort Polk.
Imprint
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2007.