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Author
- Geological Survey (U.S.)30
- Butler, John Robert, 1930-1
- Drew, Lawrence J.1
- Geological Survey (U.S.). Geologic Division1
- Geological Survey (U.S.). National Mapping Division1
- Kuntz, Mel A.1
- Lohman, Stanley William, 1907-1
- National Geographic Society (U.S.). Cartographic Division1
- U.S. Coast and Geodetic Survey1
