Matching Items (4)
Filtering by
- All Subjects: Grand Canyon National Park (Ariz.)
- Creators: Moran, P. J.
- Creators: Borkan, Ronald E.
- Creators: Parrish, Wayne W.
![41136-Thumbnail Image.png](https://d1rbsgppyrdqq4.cloudfront.net/prism/s3fs-public/2021-04/41136-Thumbnail%20Image.png?VersionId=jjJWjLpf1k2d1dTqkZTtSasO3F_z4bAV)
ContributorsMoran, P. J. (Author)
Created1925-04-08
Description
Letter from P. J. Moran to Carl T. Hayden inquiring when construction will begin on the approach road to Bright Angel Trail.
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ContributorsMoran, P. J. (Author)
Created1926-03-24
Description
Letter from P. J. Moran to Carl T. Hayden inquiring when construction will begin on the approach road to Bright Angel Trail.
![41498-Thumbnail Image.png](https://d1rbsgppyrdqq4.cloudfront.net/prism/s3fs-public/2021-04/41498-Thumbnail%20Image.png?VersionId=Uf6wGCpJbTrkn9k8ETqJ7dSZ8eHgntMw)
ContributorsParrish, Wayne W. (Author) / U.S. National Aeronautic Association (Publisher)
Created1937-01
DescriptionMagazine article describing the experience of flying over the Grand Canyon in a plane.
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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.