01562nam 2200397I 450 991070357760332120150129115641.0(CKB)5470000002431922(OCoLC)900973603(EXLCZ)99547000000243192220150129d1999 ua 0engurbn|||||||||rdacontentrdamediardacarrierDistribution and abundance of submersed aquatic vegetation in the tidal Potomac River and upper Potomac Estuary, Maryland, Virginia, and the District of Columbia, 1993-1998 /by Henry A. Ruhl [and three others]Reston, Virginia :U.S. Geological Survey,1999.1 online resource (iv, 39 pages) illustrationsU.S. Geological Survey open-file report ;99-233Title from title screen (viewed on Jan. 26, 2015).Includes bibliographical references (pages 4-5).Aquatic plantsPotomac RiverWater qualityPotomac RiverPotomac RiverPotomac River EstuaryAquatic plantsWater qualityRuhl H. A(Henry A.),1405561Geological Survey (U.S.),GPOGPOBOOK9910703577603321Distribution and abundance of submersed aquatic vegetation in the tidal Potomac River and upper Potomac Estuary, Maryland, Virginia, and the District of Columbia, 1993-19983482384UNINA