Classification and management of USDI Bureau of Land Management's riparian and wetland sites in eastern and southern Idaho - United States. Bureau of Land Management. Idaho State Office. (Bitterroot Restoration Incorporated, 2002)

Classification of deer habitat in the ponderosa pine forest of the Black Hills, South Dakota - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1972)

The classification of flowering plants - Rendle, A. B. (Alfred Barton), 1865 -1938 (Univ. Press, 1904)

The classification of flowering plants - Rendle, A. B. (Alfred Barton), 1865 -1938 (University press, 1904)

A Classification of forest habitat types of the Lincoln National Forest, New Mexico - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1984)

A classification of forest habitat types of the southern Arizona and portions of the Colorado Plateau - DeVelice, Robert L. (U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1996)

Classification of sand dune and sand plain plant communities in the Wainwright Dunes Ecological Reserve - Alberta. Alberta Sustainable Resource Development. (Geowest Environmental Consultants Ltd, 2003)

Classification of Southwestern Montana plant communities : emphasizing those of Dillon Resource Area, Bureau of Land Management - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1995)

Classification of the forest vegetation of Colorado by habitat type and community type - Alexander, Robert R. (1987)

Classification of the forest vegetation of Wyoming - Alexander, Robert R. (1986)

Classification of the plant communities of Beaverhead, Silver Bow, and Madison Counties, Montana - United States. Bureau of Land Management. Billings District Office. (Montana Natural Heritage Program, 1992)

Clavis agrostographiae antiquioris. Uebersicht des Zustandes der Agrostographie bis auf Linné; und Versuch einer Reduction der alten Synonyme der Gräser auf die heutigen Trivialnahmen - Trinius, Carl Bernhard, 1778 -1844 (In der Biedermann'schen Hofbuchhandlung, 1822)