1. Research anthropologist at Grand Canyon National Park, Arizona 86023, and an adjunct professor of anthropology at Southern Illinois University, Carbondale
2. Professor and chairman of the Department of Anthropology and director of the Center for Archaeological Investigations at Southern Illinois University, Carbondale 62901
3. Geologist with the U.S. Geological Survey, Flagstaff, Arizona 86001, and an adjunct professor of geology at Northern Arizona University, Flagstaff
4. Professor in the Laboratory of Tree-Ring Research, University of Arizona, Tucson 85721
5. Associate professor of botany at Northern Arizona University, Flagstaff 86001