01851oam 2200541 450 991071388240332120200825090941.0(CKB)5470000002504867(OCoLC)680214514(OCoLC)624847204(OCoLC)664539725(OCoLC)974643444(OCoLC)995470000002504867(EXLCZ)99547000000250486720101108d1983 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierPrimary productivity by phytoplankton in the tidal, fresh Potomac River, Maryland, May 1980 to August 1981 /by Ronald R.H. Cohen and Sheryl O. PollockReston, Va. :U.S. Geological Survey,1983.1 online resource (76 pages) illustrations, mapsWater-resources investigations report ;83-4255Includes bibliographical references (pages 27-28).PhytoplanktonPotomac RiverFreshwater phytoplanktonPotomac RiverFreshwater phytoplanktonfastPhytoplanktonfastPotomac RiverUnited StatesPotomac RiverfastPhytoplanktonFreshwater phytoplanktonFreshwater phytoplankton.Phytoplankton.Cohen Ronald R. H.1398353Pollock Sheryl O.Geological Survey (U.S.),OCLCEOCLCEOCLCQOCLCFOCLCQOCLCOOCLCQCOPGPOBOOK9910713882403321Primary productivity by phytoplankton in the tidal, fresh Potomac River, Maryland, May 1980 to August 19813461423UNINA