Betancourt, J. L., Schuster, W. S., Mitton, J. B. and Anderson, R. S. 1991. Bradley, A. F., N. V. Noste, and W. C. Fischer. Fire ecology of forests and woodlands in Utah. U.S. Forest Service General Technical Report INT-287. Branson, F. A. 1985.
Vegetation changes on western rangelands.
Range Monograph No. 2. Brown, D. E. 1994. Biotic communities of the Southwestern United States and northwestern Mexico. Cartledge, T. R. and Propper, J. G. 1993. Christensen, E. M. and Johnson, H. B. 1963.