Matching Items (2)
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- All Subjects: Grand Canyon National Park (Ariz.)
- Creators: Maxon, John H.
- Creators: McCarl, J. R.
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.
ContributorsMcCarl, J. R. (Author)
Created1927-11-15
Description
Letter from J. R. McCarl to Secretary of the Interior on concessions and contracts in the park.