1. Lithics: Macroscopic Approaches to Analysis;Andrefsky,2005
2. Mesoamerican origin for an obsidian scraper from the Precolumbian Southeastern United States;Barker;Am. antiq.,2002
3. Analysis of an obsidian biface reportedly found in the Connecticut River valley of Vermont;Boulanger;Archaeol. Eastern North America,2007
4. The sweet potato: an exercise in methodology;Brand,1971
5. Obsidian exchange spheres;Braswell,2010