An illustrated flora of the Pacific States: Washington, Oregon, and California - Abrams, Le Roy, 1874 -1956 (Stanford University Press, 1923)

An illustrated flora of the Pacific States: Washington, Oregon, and California - Abrams, Le Roy, 1874 -1956 (Stanford University Press, 1960)

An illustrated guide to the special status plants of the Shoshone Resource Area (Upper Snake River District) - United States. Bureau of Land Management. (Bureau of Land Management, Idaho State Office, 1998)

Illustrated manual of proposed endangered and threatened plants of Utah - U.S. Fish; Wildlife Service (Denver, Colorado, 1979)

Impacts of land use practices on Merriam's turkeys in forested habitats in southeastern Montana : (ecology of Merriam's turkeys in relation to burned and logged areas in southeastern Montana) - Thompson, William L. (William Lawrence), 1962 - (Dept. of Fish Wildlife and Parks?, 1993)

Important range plants : their life history and forage value - Sampson, Arthur W. (Arthur William), 1884 -1967 (U.S. Dept. of Agriculture, 1917)

Index herbariorum. Part II, Collectors - International Bureau For Plant Taxonomy; Nomenclature (Bohn, Scheltema & Holkema, 1983)

Index herbariorum - International Association for Plant Taxonomy (Published and Distributed for International Association for Plant Taxonomy by New York Botanical Gardens, 1990)