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ContributorsJohn Howard Pyle, John Howard Pyle (Reporter) / KTAR NBC (Broadcaster)
Created1936-04-12
DescriptionRadio transcript of a sunrise service conducted in the Grand Canyon on Easter Sunday.
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ContributorsHayden, Carl T. (Author) / Smith, George Otih (Author)
Created1918-04-25
Description

Letter from Carl Hayden to George Otis Smith asking his advice regarding the mining of asbestos deposits in the Grand Canyon.

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ContributorsMatthes, F. (Author) / Evans, R. T. (Author) / The Military engineer (Publisher)
Created1926-05
DescriptionGeological Survey of the Grand Canyon in published journal. Vol. XVIII, No. 99.