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Author
- Geological Survey (U.S.)2
- Gibbons, Anthony B.2
- White, George W. (George Willard), 1903-19852
- Bownocker, J. A. (John Adams), 1865-19281
- Campbell, Marius Robinson, 1858-19401
- Chaplin, James R.1
- De Witt, Wallace, Jr., 1920-20121
- Dobrovolny, Ernest, 1912-1
- Flint, Norman K. (Norman Keith), 1921-1
- Kohut, Joseph J.1
- Lamborn, Raymond E. (Raymond Ellwood), 1890-1
- Larsen, Glenn Erik1
- Luft, Stanley Jeremie, 1927-1
- Morris, Robert H.1
- Newberry, J. S. (John Strong), 1822-18921
- Ohio. Division of Geological Survey1
- Osborne, Robert H.1
- Outerbridge, William F.1
- Phalen, W. C. (William Clifton), 1877-19491
- Richard, Lawrence V.1
