%0 Book Section %B Advances in Titicaca Basin Archaeology-2 %D 0 %T Trends in Early Non-local Obsidian Artifacts from the Rio Ilave Viewed from Surface Survey and Late Archaic Excavations %A Craig, Nathan M. %A Aldenderfer, Mark %E Stanish, Charles %E Klarich, Elizabeth A. %C Los Angeles, Calif. %I Cotsen Institute of Archaeology at UCLA