Moholy-Nagy, Hattula. <br/><br/>
Mexican obsidian at tikal, Guatemala. 

 - Washington, DC-US :   Society for American Archaeology,   1999. 
 - p. 300-313 :   il 
 - trimestral 
 - Vol.10, no.3(Sep.1999) 
 - Latin American Antiquity ;   vol.10, no.3 .
 - Estados Unidos.   Society for American Archaeology. .
<br/><br/> Articulo dentro de reports.