Matching Items (4)
Filtering by
- All Subjects: Grand Canyon National Park (Ariz.)
- Creators: Riordan, M. J.
- Creators: Borkan, Ronald E.
- Creators: Edwards, John H.
ContributorsRiordan, M. J. (Author)
Created1924-03-17
Description
Letter from M. J. Riordan to Carl Hayden expressing his opposition to the federal government's takeover of Bright Angel Trail.
ContributorsEdwards, John H. (Author) / United States Department of the Interior (Publisher)
Created1926-04-02
DescriptionGrand Canyon National Park General Regulations.
ContributorsRiordan, M. J. (Author)
Created1924-03-07
Description
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.
ContributorsUnderhill, A. Heaton (Author) / Borkan, Ronald E. (Author) / Battelle Memorial Institute. Technology Partnership Practice (Publisher)
Created1986-04
Description
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.