Popham, Edward J <br/><br/>
Some aspects of life in fresh water / 
Edward J. Popham. 
 - 2nd ed. 
 - London:  Heinemann,  1961. 
 - 127 p. :  ill. ;  19 cm. 
<br/><br/>Includes bibliography. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Freshwater biology