Mellanby, Helen <br/><br/>
Animal life in fresh water :  a guide to fresh-water invertebrates / 
Helen  Mellanby ; with foreword by L. E. S. Eastham 
 - 6th rev. ed. 
 - London :  Methuen,  1963 
 - 308 p. :  ill. ;  19 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Freshwater animals<br/>Invertebrates
<br/><br/><label>Dewey Class. No.: </label>591.929