Harmer, S. F. <br/><br/>
Fresh water biology 
S. F. Harmer and Mellanby 
 - Delhi  Asiatic Publishing House  1997 
 - viii, 296p.: ill.; 22cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aquatic Ecology
<br/><br/><label>Dewey Class. No.: </label>574.2632  / HAR