Water quality in the Allegheny and Monongahela River Basins :  Pennsylvania, West Virginia, New York, and Maryland, 1996-98 / 
by Robert M. Anderson...[et al.]. 
 - [Reston, Virginia]:   [U. S. Geological Survey],   [U. S. Department of the Interior]  [2000].  
 - iv, 32 p. :  ill., maps, tables ;  28 cm. 
 -  1202 .
<br/><br/>Includes bibliographical references (p. 25-26). 
<br/><br/><label>ISBN: </label>0607954116 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water quality--Monongahela River Watershed (West Virginia and Pennsylvania)<br/>Water quality--Allegheny River Watershed (Pennsylvania and New York)
<br/><br/><label>Dewey Class. No.: </label>363.73942097486