References

For more information on sagebrush steppe see the following references:

Barbour, M. G. and W. D. Billings, 1988. North American Terrestrial Vegetation. Cambridge University Press, Cambridge.

Daubenmire, R. 1988. Steppe Vegetation of Washington. USDA, Pullman.

Douglas, W. O. 1950. Of Men and Mountains. Harper, New York.

Franklin, Jerry F. and C. T. Dyrness. 1988. Natural Vegetation of Oregon and Washington. Oregon State University Press, Corvallis.