Manuscripts
The San Juan group the morning we started for Lees Ferry. USGS San Juan survey. Robert Allen; Hugh Hyde; Elwyn Blake; Bert Loper; Kelly Trimble
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The San Juan Group the morning we started for Lees Ferry. USGS survey of the San Juan River. Christensen; Hyde; Blake; Loper; Trimble
Manuscripts
mssMarston papers V183/0093

Bert Loper at left and kelly W. Trimble at right. Bert was in his prime as head boatman of the USGS San Juan Survey. Glen Canyon
Manuscripts
mssMarston papers V160/0100

Bert Loper. Glen Canyon during the San Juan Survey by the USGS
Manuscripts
mssMarston papers V160/0103

Kelly Trimble, chief of party, USGS survey of the San Juan River in 1921. Taken in Glen Canyon
Manuscripts
mssMarston papers V169/0088

Start of San Juan survey 6 miles west of Bluff. The boatman in the distance is Bert Loper
Manuscripts
mssMarston papers V179/0133

Killing fish with sticks. Mud flood. Honaker. Left to right: Blake; Hyde; Loper; Christensen; Trimble
Manuscripts
mssMarston papers V125/0051