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  1. 1

    Beaufortian stratigraphic plays in the National Petroleum Reserve--Alaska (NPRA) Version 1.0. by Houseknecht, David W.

    Published: U.S. Dept. of the Interior, U.S. Geological Survey, 2003
    “…U.S. Geological Survey open-file report ;…”
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    Beaufortian stratigraphic plays in the National Petroleum Reserve--Alaska (NPRA)
  2. 2

    Brookian stratigraphic plays in the National Petroleum Reserve--Alaska (NPRA) Version 1.0. by Houseknecht, David W.

    Published: U.S. Dept. of the Interior, U.S. Geological Survey, 2003
    “…U.S. Geological Survey open-file report ;…”
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    Brookian stratigraphic plays in the National Petroleum Reserve--Alaska (NPRA)
  3. 3

    Molluscan fossils and stratigraphic descriptions from the Upper Cretaceous Mancos Shale, west-central Colorado Version 1.0. by Merewether, E. A. (Edward Allen), 1930-

    Published: U.S. Geological Survey, 2006
    Description: iii, 17 pages : digital, PDF file.
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    Molluscan fossils and stratigraphic descriptions from the Upper Cretaceous Mancos Shale, west-central Colorado
  4. 4

    A USGS zonal table for the Upper Cretaceous middle Cenomanian-Maastrichtian of the Western Interior of the United States based on ammonites, inoceramids, and radiometric ages Version 1.0. by Geological Survey (U.S.)

    Published: U.S. Geological Survey, 2006
    Description: 46 pages : digital, PDF file.
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    A USGS zonal table for the Upper Cretaceous middle Cenomanian-Maastrichtian of the Western Interior of the United States based on ammonites, inoceramids, and radiometric ages

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