Mellanby, Helen  x <br/><br/>
Animal life in fresh water ;  a guide to fresh-water invertebrates. 

 - x 
 - London  Methuen  1968 
 - viii, 308p 
<br/><br/>Includes 
<br/><br/><label>ISBN: </label>x     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Zoology Zoology 
<br/><br/><label>Dewey Class. No.: </label>591.1/MEA