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Site-planning peinciples and concepts of directionality among the ancient maya. 

 - Washington, DC-US :   Society for American Archaeology,   1991. 
 - p. 199-226 :   il 
 - trimestral 
 - Vol.2, no.3(Sep.1991) 
 - Latin American Antiquity ;   vol.2,no.3 .
 - Estados Unidos.   Society for American Archaeology. .