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Author
- Geological Survey (U.S.)13
- Maryland Geological Survey6
- Darton, Nelson Horatio, 1865-19483
- Cloos, Ernst, 1898-19742
- Glaser, John D.2
- Amsden, Thomas William1
- Bascom, F. (Florence), 1862-19451
- Brezinski, David K.1
- Cleaves, Emery T.1
- Davies, William Edward, 1917-1
- Drake, Avery Ala, 1927-1
- Fisher, George Wescott, 1937-1
- Fuller, H. Kit1
- Hack, John T. (John Tilton), 1913-19911
- Jonas, Anna I. (Anna Isabel), 1881-1974, author, cartographer1
- Keith, Arthur1
- Martin, G. C. (George Curtis), 1875-19431
- Maryland. Department of Geology, Mines, and Water Resources1
- Miller, Benjamin L. (Benjamin LeRoy), 1874-19441
- Shattuck, George Burbank, 1869-19341
