Carter, Virginia <br/><br/>
Distribution and abundance of submersed aquatic vegetation in the tidal Potomac River and estuary, Maryland and Virginia, May 1978 to November 1981 :  a water quality of the tidal potomac river and Estuary  / 
by Virginia Carter, James E. Paschal, and Nancy Bartow 
 - Reston, Va. :  U.S. Geological Survey,  1985 
 - vii, 46 p. :  ill., maps ;  28 cm. 
 - U.S. Geological Survey water supply paper ;  Pap.no.2234-A .
<br/><br/>Includes bibliographical references (p. 28-31). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydrilla--Geographical distribution--Potomac River<br/>Hydrilla--Control--Potomac River<br/>Aquatic plants--Geographical distribution.--Potomac River<br/>Water quality--Potomac River
<br/><br/><label>Dewey Class. No.: </label>581.76