Manuscripts
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
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Bert Loper. Glen Canyon during the San Juan Survey by the USGS
Manuscripts
mssMarston papers V160/0103
Amos Hill, the hermit of Red Canyon. Bert Loper at left. Kelly Trimble of the USGS, above
Manuscripts
mssMarston papers V106/0065
Kelly Trimble, chief of party, USGS survey of the San Juan River in 1921. Taken in Glen Canyon
Manuscripts
mssMarston papers V169/0088
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
Manuscripts
mssMarston papers V183/0095
