Jeffries, Michael. <br/><br/>
Freshwater ecology principles and applications / 
Michael Jeffries and Derek Mills. 
 - London :  Belhaven Press,  1990. 
 - vi, 285 p. :  ill. ;  23 cm. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>1852930217 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Freshwater ecology.<br/>Human beings--Influence on nature.