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Author/Creator
- Geological Survey (U.S.)23
- Busby, John F.7
- Pettijohn, Robert A.7
- Maps.com (Firm)4
- National Regional Aquifer Systems Analysis Program (U.S.)4
- Cervantes, Michael A., 1957-3
- Christiansen, Ann Coe3
- Layman, Thomas B.3
- Richmond, Gerald Martin, 1914-3
- University of Texas. Bureau of Economic Geology3
- Coastal and Marine Geology Program (Geological Survey)2
- Egan, Kristine, 1965-2
- Estaville, Lawrence E. (Lawrence Ernest)2
- Galaviz, Abel A., 1951-2
- Klipp, Emily S.2
- Kuniansky, Eve L.2
- Lurry, Dee L.2
- Morton, Robert A.2
- Oklahoma Geological Survey2
- Peterson, Russell L.2