@article{121511,
      note = {Contribution of the Regional Aquifer Systems Analysis  Program.},
      author = {Downey, Joe S.},
      url = {http://library.usi.edu/record/121511},
      title = {Geohydrology of bedrock aquifers in the northern Great  Plains in parts of Montana, North Dakota, South Dakota, and  Wyoming /},
      publisher = {U.S. G.P.O. ;},
      recid = {121511},
      pages = {vii, 87 p. :},
      address = {[Washington :},
      year = {1986},
}