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1Published 1909“...Grand Canyon (Ariz.)...”
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4by Crampton, C. Gregory (Charles Gregory), 1911-1995“...Grand Canyon (Ariz.)...”
Published 1972
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8Published 1978“...Grand Canyon (Ariz.)...”
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10Published 1970“...Grand Canyon (Ariz.)...”
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12“...Grand Canyon (Ariz.)...”
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