Ward, Henry Baldwin. <br/><br/>
Freshwater biology 

 - 2 ed. 
 - New York :  Wiley,  1959 
 - 1248 p.  : ilus. 
<br/><br/><label>LCCN: </label>51802 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agua dulce--Biologia.
<br/><br/><label>Dewey Class. No.: </label>574.929  / W37 1959