Origins of American conservation / 
edited for the Natural Resources Council of America by Henry Clepper. 
 - New York :  T. Wiley,  1966. 
 - 193 p.:  ill . ;  24 cm . 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0471068500 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural resources--United States.