Palka, Joel W. <br/><br/>
Ancient maya defensive barricades, warfare, and site abandonment. 

 - Washington, DC-US :   Society for American Archaeology,   2001. 
 - p. 427-430 
 - trimestral 
 - Vol.12, no.4(Dec.2001) 
 - Latin American Antiquity ;   vol.12, no.4 .
 - Estados Unidos.   Society for American Archaeology. .
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