Nitrogen dynamics in the tidal freshwater Potomac River, Maryland and Virginia, water years 1979-81 / by David J. Shultz (U.S. Geological Survey water-supply paper ; 2234-J) (A Water-quality study of the tidal Potomac River and Estuary ; [ch. J])
Nitrogen dynamics in the tidal freshwater Potomac River, Maryland and Virginia, water years 1979-81 / by David J. Shultz
(U.S. Geological Survey water-supply paper ; 2234-J) (A Water-quality study of the tidal Potomac River and Estuary ; [ch. J])