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>LCCN: </label>76020405 //r81 
<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>574.52632  / W739f