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R. Roy Johnson is a retired ornithologist and senior research scientist for the National Park Service, and a former adjunct professor at the University of Arizona. He is a co-author of Grand Canyon Birds (1987).
R. Roy Johnson (1 Title)

To view any of this author's books, simply click the cover image or title below.

Requiem for the Santa Cruz
An Environmental History of an Arizona River
By Robert H. Webb; Julio L. Betancourt; R. Roy Johnson; Raymond M. Turner; Foreword by Bernard L. Fontana

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