Darling, F. Fraser <br/><br/>
Future environments of North America :  being the record of a conference convened by The Conservation Foundation in April, 1965, at Airlie House, Warrenton, Virginia / 
F. Fraser Darling, John P. Milton. 
 - New York :  The Natural History Press,  1966. 
 - 767 p. ;  24 cm. 
<br/><br/><br/>English 
<br/><br/><label>Subjects--Index Terms: </label>Conservation  Conservación Economics Economía 
<br/><br/><label>Dewey Class. No.: </label>333.7