1. Department of Geology; University of Cincinnati; 500 Geology and Physics Building Cincinnati OH 45221 U.S.A.
2. Department of Anthropology; 481 Braunstein, University of Cincinnati; Cincinnati OH 45221 U.S.A.
3. Department of Paleobiology; National Museum of Natural History, Smithsonian Institution; PO Box 37012 Washington DC 20013 U.S.A.
4. Chevron Corporation; 1500 Louisiana Street Houston TX 77002 U.S.A.