Parnell, J. Jacob. <br/><br/>
Soil chemical analysis of anacient activities in cerén, el salvador :   A case study of a rapidly abandoned site. 

 - Washington, DC-US :   Society for American Archaeology,   2002. 
 - p. 331-342 :   il 
 - trimestral 
 - Vol.13, no.3(Sep.2002) 
 - Latin American Antiquity ;   vol.13, no.3 .
 - Estados Unidos.   Society for American Archaeology. .
<br/><br/> Articulo dentro de reports.