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Author/Creator
- Geological Survey (U.S.)26
- TTK Healthcare Limited. Publications Division3
- United States. National Aeronautics and Space Administration3
- Braddock, William A., 1929-20032
- Eicher Goodearth Limited2
- Grant, John A. (John Alexander)2
- Jacob, Fabiola2
- Orndorff, Randall C.2
- Ryder, Robert T.2
- United States. National Park Service2
- Weary, David J.2
- Bohannon, Robert G.1
- Booth, Derek B.1
- Brew, David A.1
- California Geological Survey1
- Chuang, Frank C.1
- Cole, James C.1
- Crown, David A. (David Arden)1
- Ford, Arthur B. (Arthur Barnes), 1932-1
- Geological Survey (U.S.). Ground-water Resources Program1