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Author
- Geological Survey (U.S.)429
- Miller, Todd S.18
- Darton, Nelson Horatio, 1865-19489
- Muller, Ernest Hathaway, 1923-8
- Osterkamp, W. R.8
- Price, Don, 1929-6
- Mower, R. W. (Reed W.), 1924-5
- Curtin, Stephen E.4
- Duigon, Mark T.4
- Geological Survey (U.S.), cartographer4
- Hillier, Donald E.4
- Iowa. Department of Natural Resources. Geological Survey Bureau3
- Shampine, William J.3
- Barr, G. L.2
- Faust, Robert J.2
- Geological Survey of Alabama2
- Hunter, Jonathan A.2
- Jordan, Richard J.2
- Kister, Lester R.2
- Lohman, Stanley William, 1907-2
