Ross, R.L. and H.E. Hunter. 1976. Climax vegetation of Montana 

 based on soils and climate. USDA Soil Conservation Service, 

 Bozeman, Montana. 64 pp. 



Schassberger, L.A. 1988. Status Review of Astragalus barrii, U.S.D.A. 

 Forest Service - Region 1 Custer National Forest. 

 Unpublished. 21 pp., appendices. 



Shelly, J.S. 1989. Plant species of special concern. Montana 

 Natural Heritage Program, Helena. 22 pp., mimeo. 



U.S. Department of Agriculture. 1971. Soil Report for Ashland and 

 Fort Howes Ranger Districts, Custer National Forest. Region 

 1, U.S. Forest Service, Missoula, Montana, Unpublished. 

 171 pp. 



U.S. Department of Agriculture. 1988. Sensitive Plant Field Guide 

 to Northern Idaho and Montana. U.S. Forest Service, Northern 

 Region, Range, Air, Watershed, and Ecology. Missoula, 

 Montana. 



U.S. Department of Commerce. 1982. Monthly Normals of 



Temperature, Precipitation, and Heating and Cooling Degree 

 Days 1951-80. National Oceanic and Atmospheric 

 Administration, Climatography of the United States No. 81. 

 23 pp. 



U.S. Department of Interior, Fish and Wildlife Service. 1985. 

 Endangered and threatened wildlife and plants: Review of 

 plant taxa for listing as endangered or threatened species. 

 Federal Register 50 ( 188) : 39526-39584 . 



Visher, S.S. 1954. Climatic Atlas of t^e United States. Harvard 

 Univ. Press, Cambridge, Mass. 403 pp. 



