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ContributorsMcCutcheon, John T. (Author, Illustrator) / Appleton's Magazine (Publisher)
Created1909-06-01
Description

Description of traveling down Bright Angel Trail by donkey.

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ContributorsMatthes, F. (Author) / Evans, R. T. (Author) / The Military engineer (Publisher)
Created1926-05
DescriptionGeological Survey of the Grand Canyon in published journal. Vol. XVIII, No. 99.
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Created2008-12
Description

This is the fourth study conducted by The University of Arizona since the late 1970s which assesses direct spending by Mexican visitors and estimates their total economic impact on Arizona.