River ecology and man :  proceedings of an International Symposium on River Ecology and the Impact of Man, held at the University of Massachusetts, Amherst, Massachusetts, June 20-23, 1971 / 
edited by Ray T. Oglesby, Clarence A. Carlson [and] James A. McCann. 
 - New York :  Academic Press,  1972. 
 - xvii, 465 p. ;  24cm. 
 - Environmental sciences : an interdisciplinary monograph series .
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rivers--Congresses.<br/>Water--Pollution--Congresses.<br/>Ecology--Congresses.