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Author
- Geological Survey (U.S.)18
- Wood, Gordon H. (Gordon Harry), 1919-13
- Kent, Bion H. (Bion Huntley), 1925-6
- Geological Survey of Pennsylvania5
- Roen, John B.4
- Stose, George Willis, 1869-19604
- Arndt, Harold H.3
- Berryhill, Henry L. (Henry Lee), 1921-3
- Rothrock, Howard Eugene, 1893-3
- Schweinfurth, Stanley P.3
- Trexler, J. Peter, 1926-3
- Bascom, F. (Florence), 1862-19452
- Butts, Charles, 1863-19462
- Campbell, Marius R. (Marius Robinson), 1858-19402
- Campbell, Marius Robinson, 1858-19402
- Clapp, Frederick G. (Frederick Gardner), 1879-19442
- Drake, Avery Ala, 1927-2
- Fuller, Myron L.2
- Haley, Boyd Raymond, 1922-2
- Munn, M. J. (Malcolm John), 1874-19492
