Willoughby, L. G. <br/><br/>
Freshwater biology /  
L. G. Willoughby. 
 - London :   Hutchinson,   1976. 
 - 167 p., [8] p. de lâms. :   il., mapas. 
 - Topics in the biological sciences .
<br/><br/><label>ISBN: </label>0071254310 
<br/><br/><label>LCCN: </label>76382212  
<br/><br/><label>Nat. Bib. No.: </label>GB76-28227 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biologia de água doce.
<br/><br/><label>Dewey Class. No.: </label>574.52632