(Originally submitted to the National Park Service, Southwest Region, Santa Fe.) ... Bureau of American Ethnology Bulletin 173:131-260. ... Helwig, Jane T. and Kathryn A. Council (editors) 1979 SAS Usera#39;s Guide, 1979 Edition. ... Phillips Academy Southwestern Expedition Papers No. 7. ... Ford 1975 Neutron Activation Analysis of Obsidian from Archaeological Sites and Natural Sources in New Mexico.