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Author/Creator
- Geological Survey (U.S.)13
- Palmer, Allison R.4
- Walcott, Charles D. (Charles Doolittle), 1850-19274
- Barnes, Harley, 1916-19792
- Bridge, Josiah, 1890-19532
- Christiansen, Robert L.2
- Cone, George C.2
- Hayes, Philip T. (Philip Thayer), 1923-2
- Holland, C. H. (Charles Hepworth)2
- McCollum, Linda Busby2
- Meisler, Harold2
- Merriam, C. W. (Charles Warren), 1905-19742
- Miller, David M. (David MacArthur), 1951-2
- Mixon, Robert B.2
- Pavlides, Louis, 1921-2
- Pennsylvania. Department of Internal Affairs2
- Reed, John Calvin, Jr., 1930-2
- Resser, Charles Elmer, 1889-19432
- Secord, James A.2
- Southwick, D. L. (David Leroy), 1936-2