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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.

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ContributorsBass, W. W. (Author)
Created1926-01-06
Description

Letter from W. W. Bass to Carl Hayden regarding the sale of Bass properties to the Santa Fe Railroad Company.

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ContributorsBass, W. W. (Author)
Created1924-04-12
Description

Letter from W.W. Bass to Carl Hayden expressing his difficulty in selling his canyon property.

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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.

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Created1986-03
DescriptionCooperative National Park Resources Study Unit of Arizona, a special report, v no. 4, improving viistor communciation in Grand Canyon National Park
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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.