Manuscripts
Riding air mattresses at 231.5- Grand Canyon
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Grand Canyon: air services
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

Homer Morgan swimming on air mattress through Bridge Canyon Rapid
Manuscripts
mssMarston papers P007/0603

Down to mouth of Separation Canyon. Air mattresses and the small inflated craft
Manuscripts
mssMarston papers V097/0095

Look-see of 232 Mile Rapid before Visbak floated through on air mattress
Manuscripts
mssMarston papers V094/0193

Jorgen Visbak look-sees 232 Mile Rapid before running it on an air mattress
Manuscripts
mssMarston papers V094/0194
