Manuscripts
Man-made switchback about a half mile from Snyder Mine
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View of Snyder Mine from route between 217 Mile Rapid and Trail Canyon
Manuscripts
mssMarston papers V092/0010
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Trail Canyon; Snyder Mine - Mile 219-220
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
