Filtering by
- All Subjects: Campbell, Gilbert Alan, 1906-1985
- All Subjects: Flora and fauna
- All Subjects: Cataract Canyon (Wayne County-San Juan County, Utah)
- Member of: 100 Years of Grand: The Grand Canyon Centennial Project
Letter from Harold Greene to Carl Hayden regarding the proposed boundaries for the national park bill.
Letter from Carl T. Hayden to C. H. Gensler, Havasupai Indian Reservation, regarding Hualapai and Cataract Canyons geography.
Amendments to the bill establishing the Grand Canyon a National Monument. Circa 1908.
Press release on the increase in wildlife in the Grand Canyon including mountain sheep, deer, and the Abert Squirrel.
Typescript report, black and white, describing the mammals of Grand Canyon National Park with cover drawing of a bighorn sheep.
Typescript report, black and white, describing the birds of Grand Canyon National Park with cover drawing of a bald eagle.
Handwritten cover titled, "Nature Notes of Grand Canyon, Polyphemus Moth, Female, Found at Grand Canyon, 5 July 1928, Vol. 3 - No. 2." Cover includes a drawing of the moth.