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The Canyon Revisited: A Rephotography of the Grand Canyon, 1923/1991
The Canyon Revisited A Rephotography of the Grand Canyon 1923/1991 Author:Donald L. Baars, Rex C. Buchanan, John R. Charlton Re-photography in 1991 of photos taken during the 1923 government survey of the Grand Canyon for the purpose of locating possible dam sites. Changes or lack of changes, in the canyon are clearly shown and described.