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Author
- Geological Survey (U.S.)15
- Hackman, Robert J.11
- Detterman, J. S.7
- Marshall, C. H.6
- Orkild, Paul P.6
- Pillmore, C. L., 1930-6
- Olson, A. B.3
- Sable, V. H.3
- Miller, Calvin F.2
- Ray, Richard G. (Richard Godfrey), 1920-2
- Condon, W. H. (William H.)1
- Hemphill, William R. (William Ross), 1930-1
- Kent, Bion H. (Bion Huntley), 1925-1
- Tolbert, G. E.1
