1. Ackersten, W. A. (1985). Canine function inSmilodon (Mammalia; Felidae; Machairodontinae).Natural History Museum of Los Angeles County Contributions in Science 356 1?22.
2. Adam, D. P. (1967). Late-Pleistocene and recent palynology in the Central Sierra Nevada, California. In Cushing, E. J., and Wright, H. E., Jr. (eds.),Quaternary Paleoecology, Yale University Press, New Haven, Conn., pp. 275?301.
3. Adams, D. B. (1979). The cheetah: Native American.Science 205 1155?1158.
4. Agenbroad, L. D. (1984). New World mammoth distribution. In Martin, P. S., and Klein, R. G. (eds.),Quaternary Extinctions: A Prehistoric Revolution, University of Arizona Press, Tucson, pp. 90?108.
5. Agenbroad, L. D., and Mead, J. I. (1989). Quaternary geochronology and distribution ofMammuthus on the Colorado Plateau.Geology 17 861?864.