Hammond, Norman. <br/><br/>
Obsidian hydration dating of teep phase occupation at nohmul, Belize.   

 - Washington-US :   Society for American Archaeology,   1989. 
 - p. 513-521 
 - Trimestral 
 - Vol. 54, no, 3 (Jul 1989) 
 - American Antiquity ;   vol. 54 no. 3 .
 - Washington.   Society for American Archaeology. .
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