Welch, Paul S. <br/><br/>
Limnological methods / 
by S. Paul Welch 
 - New York :  McGraw-Hill ,  1948 
 - xviii, 381 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label> USD 12.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Limnology
<br/><br/><label>Dewey Class. No.: </label>551.48