@article{197035,
      note = {Distributed to depository libraries in microfiche.},
      author = {Gautier, Donald L. and Varnes, Katharine L.},
      url = {http://library.usi.edu/record/197035},
      title = {Plays for assessment in Region IV, Rocky Mountains and  Northern Great Plains as of October 4, 1993 1995 National  assessment of oil and gas / [microform] :},
      publisher = {U.S. Dept. of the Interior, U.S. Geological Survey ;},
      recid = {197035},
      pages = {34 leaves ;},
      address = {Denver, Colo. :},
      year = {1993},
}