Allen, Shirley Walter. <br/><br/>
Conserving natural resources :  principles and practice in a democracy / 
Shirley Walter Allen. 
 - 2nd ed. 
 - New York :  McGraw-Hill,  c 1959. 
 - ix, 370 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>337  337 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural resources--United States.--Conservation
<br/><br/><label>Dewey Class. No.: </label>634.927 / A53c