An analysis of the motor-row conversion issue of Colorado River float trips.
River float trips on the Colorado River through Marble and Grand Canyons increased dramatically within the last ten years such that the National Park Service has determined to reduce numbers of river trip participants and require all motorized trips to convert to oar-powered trips by 1977. These pol...
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| Language: | en |
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The University of Arizona.
1974
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| Online Access: | http://hdl.handle.net/10150/191605 |