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  1. 1
    Areas of historical oil and gas exploration and production in the conterminous United States /
    Published 1998
    Government Document Map
  2. 2
    Exploration intensity map of the Cretaceous J Sandstone, Denver Basin, Colorado, Nebraska, and Wyoming /
    Published 1987
    Government Document Microform Map
  3. 3
    Denver Basin exploration intensity map, Colorado, Nebraska, and Wyoming /
    Published 1987
    Government Document Microform Map
  4. 4
    Exploration intensity map of the Upper Cretaceous D Sandstone, Denver Basin, Colorado, Nebraska, and Wyoming /
    Published 1987
    Government Document Microform Map
  5. 5
    Exploration intensity map of the Upper Cretaceous Niobrara Formation, Denver Basin, Colorado, Nebraska and Wyoming /
    Published 1987
    Government Document Microform Map
  6. 6
    Exploration intensity map of the Upper Cretaceous Pierre Shale, Denver Basin, Colorado, Nebraska, and Wyoming /
    Published 1987
    Government Document Microform Map
  7. 7
    Exploration intensity map of the Paleozoic section, Denver Basin, Colorado, Nebraska and Wyoming /
    Published 1987
    Government Document Microform Map
  8. 8
    Exploration intensity map of the Upper Cretaceous Codell Sandstone, Denver basin, Colorado, Nebraska and Wyoming /
    Published 1987
    Government Document Microform Map
  9. 9
    Areas of historical oil and gas exploration and production in the conterminous United States.
    Published 1995
    Government Document Book
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