Biological monitoring of aquatic systems / 
edited by Stanford L. Loeb and Anne Spacie. 
 - Boca Raton :  CRC Press ,   1994. 
 - 381 p. :  ill. ;   25 cm. 
<br/><br/> Papers presented at a symposium held Nov. 29-Dec 1, 1990 at Purdue U niversity. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0873719107 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water quality bioassays-- Congresses.<br/>Freshwater ecology-- Congresses.
<br/><br/><label>Dewey Class. No.: </label>577.6