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Author
- Kent, Bion H. (Bion Huntley), 1925-4
- Berryhill, Henry L. (Henry Lee), 1921-2
- Clapp, Frederick G. (Frederick Gardner), 1879-19442
- Geological Survey (U.S.)2
- Roen, John B.2
- Clarke, Otis M.1
- Keith, Arthur1
- Knight, Alfred L.1
- Monroe, Watson Hiner, 1907-1
- Munn, M. J. (Malcolm John), 1874-19491
- Servoss, R. D.1
- Van Loan, Walton, creator, publisher1
- Wahl, Kenneth D.1
- Wier, Charles E. (Charles Eugene), 1921-1
- Wier, Charles E. (Charles Eugene), 1921- cartographer1
