The Top of the Continent. 1917. 244 pp., illustrated.
Scribners. Rocky Mountain National Park on pp. 16-43.
The Book of the National Parks. 1926. 444 pp.,
74 illustrations, 14 maps and diagrams.
Scribners. Rocky Mountain National Park on pp. 93-117.
WILBUR, RAY LYMAN, and DU PUY, WILLIAM ATHERTON.
Conservation in the Department of the Interior.
Chapter on national parks, pp. 96-112. Illustrated.
Government Printing Office, Washington, D.C. 1931.