1. Guidon, N. Proc. 10th Congresso UICPYP Mexico, Commission XII, 101–110 (1980); in New Evidence for the Pleistocene Peopling of Americas Orono: Center for Early Man Studies (ed. Shutler, R. Jr) (Sage, Beverly Hills, in the press).
2. Guidon, N. thesis, Univ. Paris I (1984).
3. Dillehay, T. D. Scient. Am. 251 (4), 100–109 (1984).
4. Bryan, A. L. & Beltrao, M. C. Occasional Papers I, 303–305 (Department of Anthropology, University of Alberta, Edmonton, Canada, 1978).
5. Adovosio, J. M. & Carlisle, R. C. Scient. Am. 250 (5)104–108 (1984).