@article {,
title = {Trace Element Analysis of Obsidian Artifacts from the Andes: New perspectives on Pre-Hispanic economic interaction in Peru and Bolivia - LBL6343},
year = {1977},
note = {by Richard Burger and Frank Asaro.Includes bibliographical references (p. 80-88).Andes Geog},
institution = {Lawrence Berkeley Laboratory},
address = {Berkeley},
keywords = {Andes},
author = {Richard L. Burger and Asaro, Frank}
}