1. Smith, G. I. & Street-Perrott, F. A. in The Late Pleistocene (ed. Porter, S. C.) 190–212 (University of Minnesota Press, 1983).
2. Van Devender, T. R. et al. in The Geology of North America vol. K-3 (eds Ruddiman, W. F. & Wright, H. E.) 323–357 (Geological Society of America, Boulder, 1987).
3. Wells, S. G. et al., Rep. 249 (New Mexico Water Resources Research Institute, Las Cruces, 1989).
4. Thompson, G. D. Water Supply Paper 578 (United States Geological Survey, Washington, DC, 1929).
5. Ore, H. T. & Warren, C. N. Geol. Soc. Am. Bull. 82, 2553–2562 (1971).