Braswell, Geoffrey E. <br/><br/>
Determining the geological provenance of obsidian artifacts fromthe maya region :   A test ofthe eficacy of visual sourcing. 

 - Washington, DC-US :   Society for American Archaeology,   2000. 
 - p. 269-282 :   il 
 - trimestral 
 - Vol.11, no.3(Sep.2000) 
 - Latin American Antiquity ;   vol.11, no.3 .
 - Estados Unidos.   Society for American Archaeology. .