Welch, Paul S. <br/><br/>
Limnology /  
Paul S. Welch. 
 - 2nd ed. 
 - New York :  McGraw-Hill,   c 1952. 
 - ix, 538 p. :  ill. ;  22 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography : p. 443-510 
<br/><br/>345  345 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water --Environmental aspects.<br/>Limnology.
<br/><br/><label>Dewey Class. No.: </label>574.9 / W445l