Readings in resource management and conservation 
ed. and with introd. by Ian Burton and Robert W. Kates ; with the assistance of Lydia Burton.  
 - Chicago  University of Chicago Press  1970.  
 - xi, 609 s. 
<br/><br/> Bibliografi.  
<br/><br/><label>ISBN: </label>0226082377 9780226082370