WILLOUGHBY, L.G. <br/><br/>
Freshwater biology 
/ [by] L.G.Willoughby 
 - London  Hutchinson  1976 
 - 167 p.- 
 - Topics the biological sciences .
<br/><br/> Includes references & index. 
<br/><br/><label>ISBN: </label>91254302 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Freshwater biology
<br/><br/><label>Dewey Class. No.: </label>578.76  / WIL