@article{240977,
      note = {Distributed to some depository libraries in microfiche.},
      author = {Dickinson, Kendell A.,},
      url = {http://library.usi.edu/record/240977},
      title = {Distribution of the basal clastic unit of the Oligocene  Chadron Formation in the alliance 2-degree quadrangle,  northwestern Nebraska /},
      publisher = {U.S. Dept. of Interior, Geological Survey,},
      recid = {240977},
      pages = {6 leaves :},
      address = {[Denver, Colo.] :},
      year = {1990},
}