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Field Testing of Monotube Span-Type Sign Structures

ContributorsEhsani, M. R. (Mohammad Reza) (Author) / Arizona. Department of Transportation (Issuing body) / United States. Department of Transportation (Contributor) / United States. Federal Highway Administration (Contributor)
Created1986-03
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Constance Besch Interview

ContributorsFinch, Joyce (Interviewer) / Besch, Constance (Interviewee)
Created1987-07-27
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Improving Visitor Communications in Grand Canyon National Park

ContributorsGreenberg, Laura B. (Author) / Underhill, A. Heaton (Author) / Cooperative National Park Resources Studies Unit, University of Arizona (Publisher)
Created1986-03
DescriptionCooperative National Park Resources Study Unit of Arizona, a special report, v no. 4, improving viistor communciation in Grand Canyon National Park