Shackley, Steven M. <br/><br/>
Sources of archaeological obsidianin the southewst :   an archaeological petrological, and geochemical study. 

 - Washington-US :   Society for American Archaeology,   1988. 
 - p. 752-772 :   il. 
 - Trimestral 
 - Vol. 53, no, 4 (Oct 1988) 
 - American Antiquity ;   vol. 53 no. 4 .
 - Washington.   Society for American Archaeology. .
<br/><br/><br/>Inglés.