Willoughby, L. G. <br/><br/>
Freshwater biology / 
L. G. Willoughby. 
 - New York :  Pica Press : distributed by Universe Books,  1977, c1976. 
 - 167 p., [4] leaves of plates :  ill. ;  24 cm. 
 - Studies in the biological sciences .
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0876637217 
<br/><br/><label>Source: </label>B-13706 
<br/><br/><label>LCCN: </label>76020405  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Freshwater biology.
<br/><br/><label>LC Class. No.: </label>QH96  / .W53 1977 
<br/><br/><label>Dewey Class. No.: </label>574.5/2632