Rocky Mountain National Park on pp. 87-95; 262.
Kane, F.J. Picturesque America, Its Parks and Playgrounds. Published by Frederick Gumbrecht, Brooklyn, N.Y., 1925. 521 pp., illustrated.
Rocky Mountain National Park on pp. 157-176.
Longyear, Burton O.:
Trees and Shrubs of the Rocky Mountain Region. 1927. 244 pp., illustrated. G.P. Putnam's Sons, New York.
Evergreens of Colorado. 1925. 82 pp., illustrated. Multigraph Service Bureau, Fort Collins, Colo.
Mills, Enos A.:
Wild Life on the Rockies. 1909. 263 pp., illustrated. Houghton, Boston.
The Spell of the Rockies. 1911. 348 pp., illustrated. Houghton, Boston.
In Beaver World. 1913. 223 pp., illustrated. Houghton, Boston.