Manuscripts
Loper and Miser leaving Piute for Spencer- pulling boat 17 miles. USGS San Juan survey
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Hyde and Indian squaw, both smiling. Camp at mouth of Piute. USGS San Juan survey
Manuscripts
mssMarston papers V127/0023

Bert Loper. Glen Canyon during the San Juan Survey by the USGS
Manuscripts
mssMarston papers V160/0103
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San Juan Traverse, Miser-Loper correspondence
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

Bert Loper taking empty boat through No. 2 rapid at mouth of Piute Creek
Manuscripts
mssMarston papers V127/0027

Loper's boat found at Mile 41 in Marble Canyon and pulled up on the talus by the crew
Manuscripts
mssMarston papers V051/0015
