Conservation of natural resources / 
Edited by Guy-harold smith  
 - 2nd ed. 
 - New York :  Wiley,  1958  
 - xiii,474 p. :  ill. ;  25 cm. 
<br/><br/>Bibliography: p. 655-660. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Conservation of natural resources--United States.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>United States--Economic conditions.
<br/><br/><label>Dewey Class. No.: </label>333.720973  / CON 1958