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- All Subjects: Grand Canyon National Park (Ariz.)
- Creators: Campbell, Ian
- Creators: United States House of Representatives
ContributorsMaxon, John H. (Author) / Campbell, Ian (Author) / American Journal of Science (Publisher)
Created1934-10-01
DescriptionExcerpt on the Archean Ripple Mark in the Grand Canyon.
ContributorsUnited States House of Representatives (Author)
Created1917-01-24
DescriptionBill to establish the Grand Canyon as a National Park.