Asa, Frank.
Ecuadorian obsidian sources used for artifact production and methods for provenience assignments. - Washington, DC-US : Society for American Archaeology, 1994. - p.257-277 : il - trimestral - Vol.5, no.3(Sep.1994) - Latin American Antiquity ; vol.5,no.3 . - Estados Unidos. Society for American Archaeology. .
Ecuadorian obsidian sources used for artifact production and methods for provenience assignments. - Washington, DC-US : Society for American Archaeology, 1994. - p.257-277 : il - trimestral - Vol.5, no.3(Sep.1994) - Latin American Antiquity ; vol.5,no.3 . - Estados Unidos. Society for American Archaeology. .
