{"id":"000029312","type":"book","title":"Obsidian trade at San Lorenzo Tenochtitlan, Mexico : trace element analysis of obsidian artifacts at an Olmec site emphasizes the role of trade in the rise of mesoamerican civilzation. - o.O. - 17 S. : 4 Ill. ; 3 Tab. Manuskript","author":[{"family":"Cobean","given":"Robert H."}]}