Hoopes, John W. <br/><br/>
The tronadora complex :   Early formative ceramics in northewestern costa rica. 

 - Washington, DC-US :   Society for American Archaeology,   1994. 
 - p.3-30 :   il 
 - trimestral 
 - Vol.5, no.1(Mar.1994) 
 - Latin American Antiquity ;   vol.5,no.1 .
 - Estados Unidos.   Society for American Archaeology. .