Obsidian sources and distribution systems in Island Southeast Asia : a review of previous results - Spriggs, Matthew; Reepmeyer, Christian; Anggraeni; Lape, Peter V.; Neri, Leee; Ronquillo, Wilfredo P.; Simanjuntak, Truman; Summerhayes, Glenn; Tanudirjo, Daud Aris; Tiauzon, Archie (Academic Press, 2011)