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41103-Thumbnail Image.png
Created1920
DescriptionBooklet with description of the Grand Canyon.
41508-Thumbnail Image.png
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.
41975-Thumbnail Image.png
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.