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, VA :  Denver, CO :  U.S. Geological Survey, National NAWQA Program ;  Free on application to the U.S. Geological Survey, Information Services,  2000. 
 - iv, 32 p. :  ill. (some col.) col. maps ;  28 cm. 
 - U.S. Geological Survey circular ;  1202 .
<br/><br/>Includes bibliographical references (p. 25-26). 
<br/><br/><label>ISBN: </label>0607954116 (pbk. : alk. paper) 
<br/><br/><label>LCCN: </label>00-049451 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water quality--Allegheny River Watershed (Pa. and N.Y.)<br/>Water quality--Monongahela River Watershed (W. Va. and Pa.)
<br/><br/><label>LC Class. No.: </label>TD223.2  / .W38 2000 
<br/><br/><label>Dewey Class. No.: </label>363.739/42/097486