Mason, C.F. <br/><br/>
Biology of fresh water pollution   
by C F Mason 
 - 3rd ed. 
 - Essex  Longman  1996 
 - xii, 356p 
<br/><br/><label>ISBN: </label>0582247322 
<br/><br/><label>Dewey Class. No.: </label>574.929  / N96