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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 (2 Titles)

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

Grand Canyon Birds
Historical Notes, Natural History and Ecology
By Bryan T. Brown; Steven W. Carothers; R. Roy Johnson

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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