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  1. By: United States. Forest Service. Rocky Mountain Region. - Good, L. S. - Washburn, F. E. - West, V. W. - Thornton, T. O.
    Publication info: [Washington, D.C.], The Service, 1940
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: United States. Forest Service. - Washburn, F. E. - Thornton, T. O.
    Publication info: [Washington, D.C.], U.S. G.P.O, 1939
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library