Primary productivity by phytoplankton in the tidal, fresh Potomac River, Maryland, May 1980 to August 1981

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086 0 ‡aI 19.42/4:83-4255
090 ‡aGB701 ‡b.W375 1983 no.4255
100 1 ‡aCohen, Ronald R. H.
245 1 0 ‡aPrimary productivity by phytoplankton in the tidal, fresh Potomac River, Maryland, May 1980 to August 1981 / ‡cby Ronald R.H. Cohen and Sheryl O. Pollock.
260 ‡aReston, Va. : ‡bU.S. Geological Survey, ‡c1983.
300 ‡a76 p. : ‡bill., maps ; ‡c28 cm.
490 0 ‡aWater-resources investigations report, ‡x0092-223X ; ‡v83-4255
500 ‡aTables.
504 ‡aBibliography: p. 27-28.
538 ‡aMode of access: Internet.
650 0 ‡aFreshwater phytoplankton ‡zPotomac River.
650 0 ‡aPhytoplankton ‡zPotomac River.
651 0 ‡aPotomac River.
700 1 ‡aPollock, Sheryl O.
710 2 ‡aGeological Survey (U.S.)
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