Manuscripts
Grand Canyon Cave #34; Horn Canyon
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[Developed May 1973. Grand Canyon.] (34 slides)
Manuscripts
Professional and personal papers of Otis R. Marston and his collection of the materials on the history of Colorado River and Green River regions.
mssMarston papers
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Caves; Cave Canyon
Manuscripts
Professional and personal papers of Otis R. Marston and his collection of the materials on the history of Colorado River and Green River regions.
mssMarston papers
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Sock, Mon Ck, Turbocraft jet boats in Grand Canyon.] (34 slides)
Manuscripts
Professional and personal papers of Otis R. Marston and his collection of the materials on the history of Colorado River and Green River regions.
mssMarston papers
