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- Geological Survey (U.S.)38
- Ryder, Robert T.22
- Geological Survey (U.S.), issuing body18
- Harris, Anita G.6
- Repetski, John E.6
- De Witt, Wallace, Jr., 1920-20124
- National and Global Petroleum Resource Assessment Project (U.S.)4
- Ruppert, Leslie F.4
- Schultz, Arthur P.4
- Enomoto, Catherine B.3
- Trippi, Michael H.3
- American Geophysical Union2
- Appalachian Basin Industrial Associates2
- Appalachian Basin Symposium (1988 : Reston, Va.)2
- Crangle, Robert D.2
- Cullather, Chrysa M.2
- Englund, Kenneth John, 1923-2
- Higley, Debra K.2
- Hileman, G. E. (Gregg Edward), 1962-2
- Hollyday, E. F.2