Leonard, Robert D. <br/><br/>
Resource specialization, population growth, and agricutural production in the American Southwest. 

 - Washington-US :   Society for American Archaeology,   1989. 
 - p. 491-503 
 - Trimestral 
 - Vol. 54, no, 3 (Jul 1989) 
 - American Antiquity ;   vol. 54 no. 3 .
 - Washington.   Society for American Archaeology. .
<br/><br/><br/>Inglés.