TY - SER AU - Carballo, David M. TI - Formative and classic period obsidian procurementin central Mexico : : Acompositional study using laser ablation- inductively coupled plasma-mass spectrometry T2 - Latin American Antiquity ; PY - 2007/// CY - Washington, DC-US : PB - Society for American Archaeology, N1 - Articulo dentro de reports ER -