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Spence, Michael W.

Commodity or gift : Teotihuacan obsidian in the maya region. - Washington, DC-US : Society for American Archaeology, 1996. - p. 21-39 : il - trimestral - Vol.7, no.1(Mar.1996) - Latin American Antiquity ; vol.7, no.1 . - Estados Unidos. Society for American Archaeology. .