Smith, Guy-Herold <br/><br/>
Conservation of natural resources / 
Guy-Herold Smith 
 - New York :  Wiley ,  1950 
 - xii, 552 p. :  ill. ;  29 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural resources
<br/><br/><label>Dewey Class. No.: </label>333.9  / SMI