Everhart, W. Harry <br/><br/>
Effects of Chemical vartiations in aquatic environments :  volume 1 Biota and chemistry of piceance creek / 
W. Harry Everhart and Bruce E. May 
 - Washington, D.C. :  United States Environmental Protection Agency,  1973 
 - 117 p. ;  28 cm. 
<br/><br/> EPA-R3-73-011a 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemical vartiations--Analysis<br/>Aquatic ecology--Environments
<br/><br/><label>Dewey Class. No.: </label>577.6