1. Department of Anthropology, University of Pittsburgh, Pittsburgh, Pennsylvania
2. Division of Social Sciences, University of Texas at San Antonio, San Antonio, Texas
3. Department of Geology and Planetary Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania
4. Radiation Biology Laboratory, Smithsonian Institution, Rockville, Maryland
5. Carnegie Museum, Pittsburgh, Pennsylvania
6. Department of Anthropology, University of Texas at Austin Austin, Texas
7. Department of Biology Texas A&M University College Station, Texas