Filtering by
- All Subjects: Grand Canyon National Park (Ariz.)
- Creators: Riordan, M. J.
- Creators: Underhill, A. Heaton
- Creators: Patterson, E. O.
- Creators: Underwood and Underwood
Letter from M. J. Riordan to Carl Hayden expressing his opposition to the federal government's takeover of Bright Angel Trail.
Sepia stereo card of a man sitting on a rock with printed annotation, "(12) Down the Granite Gorge of the Colorado (1,200 feet deep) from Peritese Point, Grand Canyon of Arizona. Copyright 1903 by Underwood & Underwood."
Letter from E. O. Patterson to Secretary of the Interior on automobile fees in the park.
Letter from Michael J. Reardon to Carl T. Hayden, in agreement with Ralph Cameron, asserting that Bright Angel Trail should not be sold from Coconino County to the United States.
Cooperative National Park Resources Studies Unit for University of Arizona, effects on Glen Canyon Dam releases on Grand Canyon River trips, a technical report, vol. no. 16.