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- All Subjects: Grand Canyon National Park (Ariz.)
- Creators: Grand Canyon National Park
- Creators: U.S. Department of the Interior
ContributorsGrand Canyon National Park (Publisher)
Created1934-12
DescriptionPublication detailing the natural history of the Grand Canyon. Vol.9, No.9. Circa 1926-1934.
ContributorsU.S. Department of the Interior (Publisher)
Created1979-12-20
DescriptionColorado River management plan, Grand Canyon National Park, Arizona.