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Author
- Geological Survey (U.S.)4
- Orkild, Paul P.4
- Marshall, C. H.3
- Bennett, H. S.2
- Condon, W. H. (William H.)2
- Sable, V. H.2
- Williams, Paul L. (Paul Lincoln), 1932-2
- Bates, C. E.1
- Cass, John T.1
- Covington, H. R.1
- Detterman, J. S.1
- Hackman, Robert J.1
- Hemphill, William R. (William Ross), 1930-1
- Kent, Bion H. (Bion Huntley), 1925-1
- Miller, Calvin F.1
- Olson, A. B.1
- Price, Don, 1929-1
