1. Motorist's Guide to the Going-to-the-Sun Highway (1950 rev.)
|
2. Glaciers and Glaciation in Glacier National Park (1952 rev. ed.)
|
2. Glaciers and Glaciation in Glacier National Park (1962 reprint)
|
3. The Geologic Story of Glacier National Park (1957)
|
3. The Geologic Story of Glacier National Park (1971 reprint)
|
4. Trees and Forests of Glacier National Park (1956 rev.)
|
4. Trees and Forests of Glacier National Park (1961 rev.)
|
5. 101 Wildflowers of Glacier National Park (1957)
|
5. 101 Wildflowers of Glacier National Park (1967 reprint)
|
6. Mammals of Glacier National Park (1955)
|
6. Mammals of Glacier National Park (1967 reprint)
|
7. Climate of Glacier National Park (1967 rev. ed.)
|
8. Through the Years in Glacier National Park (1962 reprint)
|
9. Birds of Glacier National Park (1964)
|
Animal Tracks of Glacier National Park (1969, rev. ed. 1971, 1975)
|
1. Mammals of the Grand Canyon Region
(1935)
|
2. History and Exploration of the Grand Canyon Region
(1935)
|
3. Trees of Grand Canyon National Park
(1936)
|
4. Contributions to Grand Canyon Ornithology
(1936)
|
5. Contributions to Grand Canyon Geology
(1936)
|
6. Check-List of Plants of Grand Canyon National Park
(1936)
|
7. Prehistoric Man in the Southwest
(1936)
|
8. Check-List of Birds of Grand Canyon National Park
(1937)
|
9. Amphibians and Reptiles of Grand Canyon National Park
(1938)
|
10. Plants of Grand Canyon National Park
(1947)
|
11. Butterflies of Grand Canyon National Park
(1950)
|
12. Prehistoric People of the Northern Southwest
(1955)
|
12. Prehistoric People of the Northern Southwest
(ca. 1961)
|
13. Grand Canyon Orign and Scenery
(1961)
|
14. The Story of Man at Grand Canyon
(1967, 1972)
|
