Western American alpines and native plants of Montana, Idaho and northern Wyoming - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Frank H. Rose, 1950)

Western flower guide, wild flowers of the Rockies and west to the Pacific - Saunders, Charles Francis, 1859 -1941 (Doubleday, Page & company, 1917)

Western flower guide, wild flowers of the Rockies and west to the Pacific - Saunders, Charles Francis, 1859 -1941 (Doubleday, Page & company, 1917)

Western United States, 1918 : Correspondence, field reports, and reference materials (1 of 2) - Wetmore, Alexander, 1886 -1978 (1905)

Wholesale American seeds of conifers, palms, trees, shrubs and herbaceous plants : perennials for fall planting - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pinehurst Nurseries, 1899)

Wholesale catalogue of Colorado native plants and shrubs : autumn 1911 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (D.M. Andrews, 1911)

Wholesale catalogue of rare seeds chiefly of plants and shrubs indigenous to the Rocky Mountains of Colorado - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (D.M. Andrews, 1904)

Wholesale catalogue of rare seeds chiefly of plants and shrubs indigenous to the Rocky Mountains of Colorado - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (D.M. Andrews, 1904)

Wild flowers of the North American mountains - Henshaw, Julia W. (Julia Wilmotte) 1869 -1937 (R.M. McBride, 1915)

Wild flowers of the North American mountains - Henshaw, Julia W. (Julia Wilmotte) 1869 -1937 (R.M. McBride, 1915)

Wild flowers of the North American mountains - Henshaw, Julia W. (Julia Wilmotte) 1869 -1937 (R.M. McBride, 1915)

Wild flowers of the North American mountains - Henshaw, Julia W. (Julia Wilmotte) 1869 -1937 (R.M. McBride, 1915)

Wild flowers of the North American mountains - Henshaw, Julia W. (Julia Wilmotte) 1869 -1937 (R.M. McBride, 1915)

Wild flowers of the North American mountains - Henshaw, Julia W. (Julia Wilmotte) 1869 -1937 (R.M. McBride, 1915)

Wild flowers of the North American mountains - Henshaw, Julia W. (Julia Wilmotte) 1869 -1937 (R.M. McBride, 1915)

Wildland shrubs symposium and workshop : proceedings - Intermountain Forest; Range Experiment Station (Ogden, Utah) (s.n, 1975)

Wildlife food plants of the Southwest - Patton, David R. (U.S. Dept. of Agriculture, Forest Service, Southwestern Region, 1982)

Wildlife food plants of the Southwest - Patton, David R. (U.S. Dept. of Agriculture, Forest Service, Southwestern Region, 1982)

Wildlife food plants of the Southwest - Patton, David R. (U.S. Dept. of Agriculture, Forest Service, Southwestern Region, 1982)

Wildlife impact assessment and summary of previous mitigation related to hydroelectric projects in Montana : volume one, Libby Dam project – operator, U.S. Army Corps of Engineers - Olsen, Arnold. (Bonneville Power Administration, Division of Fish and Wildlife, 1984)

Woody plants of the western national parks; containing keys for the identification of trees and shrubs - Bailey, Harold Edwards, 1906 - (University Press, 1949)

Woody plants of the western national parks; containing keys for the identification of trees and shrubs - Bailey, Harold Edwards, 1906 - (University Press, 1949)

Woody plants of the western national parks; containing keys for the identification of trees and shrubs - Bailey, Harold Edwards, 1906 - (University Press, 1949)

Year book - Toronto Horticultural Society (1917)

Zeitschrift für Botanik (1921)

Zoe:a biological journal (Zoe Publishing Co, 1891)

Zoe:a biological journal (Zoe Publishing Co, 1892)

Zoe:a biological journal (Zoe Publishing Co, 1892)

Zoe:a biological journal (Zoe Publishing Co, 1892)

Zoologischer Anzeiger - Deutsche Zoologische Gesellschaft. (VEB Gustav Fischer Verlag, 1893)