Fowler, William R.,  <br/><br/>
Sources of obsidian from el mirador, guatemala :   New evidence on preclassic maya interation. 

 - Washington, DC :   American Anthropological Association,   1989. 
 - p. 158-168 
 - trimestral 
 - Vol.91, no.1(Mar.1989) 
 - American Anthropologist ;   vol.91, no.1 .
 - Estados Unidos.   American Anthropological Association. .
<br/><br/> Articulo dentro de research reports.