Reed, Robert M. 1976. Coniferous forest habitat types of the Wind River Mountains, Wyoming. American Midland Naturalist. Forest habitat types of the South Warner Mountains, Modoc County, California. Shiflet, Thomas N., ed.
Rangeland cover types of the United States.
Society for Range Management. U.S. Department of Agriculture, Forest Service, Intermountain Research Station. U.S. Department of Agriculture, Forest Service, Intermountain Research Station. Forest habitat types of central Idaho. U.S. Department of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station.