Wetzel , Robert G. <br/><br/>
Limnology  lake and river ecosystem 

 - 3rd ed. 
 - Philadelphia , PA  W.B Saunders  c 2001 
 - xii , 743p.  ill. ; 
<br/><br/> includes references and index 
<br/><br/><label>ISBN: </label>9780127447601 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Limnology
<br/><br/><label>Dewey Class. No.: </label>577.6