@article{229682,
      recid = {229682},
      author = {Seeland, David A.},
      title = {Origin of thick Lower Tertiary coal beds in the Powder  River Basin, Wyoming and Montana--some paleogeographic  constraints /},
      publisher = {Dept. of the Interior, U.S. Geological Survey ;},
      address = {Denver, CO :},
      pages = {iii, 13 p. :},
      year = {1993},
      url = {http://library.usi.edu/record/229682},
}