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Author
- Geological Survey (U.S.)9
- Berryhill, Henry L. (Henry Lee), 1921-2
- Campbell, Marius R. (Marius Robinson), 1858-19402
- Adams, George I. (George Irving), 1870-19321
- Bastin, Edson S. (Edson Sunderland), 1878-19531
- Clapp, Frederick G. (Frederick Gardner), 1879-19441
- Kent, Bion H. (Bion Huntley), 1925-1
- Marshall, C. H.1
- Moore, George E.1
- Munn, M. J. (Malcolm John), 1874-19491
- Power, Walter R. (Walter Robert), 1924-1
- Roen, John B.1
- Shaw, E. W. (Eugene Wesley), 1881-19351
- Swanson, Vernon Emanuel, 1922-1
