LEADER 01851oam 2200541 450 001 9910713882403321 005 20200825090941.0 035 $a(CKB)5470000002504867 035 $a(OCoLC)680214514$z(OCoLC)624847204$z(OCoLC)664539725$z(OCoLC)974643444 035 $a(OCoLC)995470000002504867 035 $a(EXLCZ)995470000002504867 100 $a20101108d1983 ua 0 101 0 $aeng 135 $aurbn||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aPrimary productivity by phytoplankton in the tidal, fresh Potomac River, Maryland, May 1980 to August 1981 /$fby Ronald R.H. Cohen and Sheryl O. Pollock 210 1$aReston, Va. :$cU.S. Geological Survey,$d1983. 215 $a1 online resource (76 pages) $cillustrations, maps 225 1 $aWater-resources investigations report ;$v83-4255 320 $aIncludes bibliographical references (pages 27-28). 606 $aPhytoplankton$zPotomac River 606 $aFreshwater phytoplankton$zPotomac River 606 $aFreshwater phytoplankton$2fast 606 $aPhytoplankton$2fast 607 $aPotomac River 607 $aUnited States$zPotomac River$2fast 615 0$aPhytoplankton 615 0$aFreshwater phytoplankton 615 7$aFreshwater phytoplankton. 615 7$aPhytoplankton. 700 $aCohen$b Ronald R. H.$01398353 702 $aPollock$b Sheryl O. 712 02$aGeological Survey (U.S.), 801 0$bOCLCE 801 1$bOCLCE 801 2$bOCLCQ 801 2$bOCLCF 801 2$bOCLCQ 801 2$bOCLCO 801 2$bOCLCQ 801 2$bCOP 801 2$bGPO 906 $aBOOK 912 $a9910713882403321 996 $aPrimary productivity by phytoplankton in the tidal, fresh Potomac River, Maryland, May 1980 to August 1981$93461423 997 $aUNINA