Haviland, William A. <br/><br/>
Glimses of the upernatural :   Altered states of consciousness and the graffiti of tikal, guatemala. 

 - Washington, DC-US :   Society for American Archaeology,   1995. 
 - p. 295-309 :   il 
 - trimestral 
 - Vol.6, no.4(Dec.1995) 
 - Latin American Antiquity ;   vol.6, no.4 .
 - Estados Unidos.   Society for American Archaeology. .