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Horizon - 1991 (November 6)

ContributorsGrant, Michael, 1951- (Host) / Kimball, Camille (Reporter) / Leshy, John D. (Interviewee) / Public Broadcasting Service (Broadcaster)
Created1991-11-06
Description
Operation Earth Edition. Arizona Town Hall Package, J. Leshy, S. Barnes, S. Wheeler (Kimball); Town Hall Background Package (Kimball); Dave Cutty Commentary. Segments on an Arizona Town Hall at the Grand Canyon concerning better care of the environment, what the Town Hall is and how it works, and Dave Cutty's…

Operation Earth Edition. Arizona Town Hall Package, J. Leshy, S. Barnes, S. Wheeler (Kimball); Town Hall Background Package (Kimball); Dave Cutty Commentary. Segments on an Arizona Town Hall at the Grand Canyon concerning better care of the environment, what the Town Hall is and how it works, and Dave Cutty's guest commentary (a first-hand account of the Town Hall's proceedings).
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Letter From Carl Hayden to George Otis Smith, U.S. Geological Survey

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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Map of Grand Canyon National Park

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.