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- Geological Survey (U.S.)38
- Geological Survey (U.S.), issuing body24
- Atwater, Brian F.11
- ebrary, Inc8
- Markewich, Helaine W.6
- Project Muse6
- Straus, Lawrence Guy5
- Hemphill-Haley, Eileen4
- Obermeier, Stephen F.4
- Steadman, David W.4
- Berglund, Björn E.3
- Blewett, William L., 1959-3
- Bousman, C. Britt3
- Frenzel, Burkhard3
- González Morales, Manuel R.3
- Hunt, Charles B. (Charles Butler), 1906-19973
- Kweakason, A. P.3
- Müller, German3
- Pielou, E. C., 1924-3
- Poore, Richard Z.3