@article{229494,
      note = {One folded map issued in pocket at end.},
      author = {Gray, Floyd.},
      url = {http://library.usi.edu/record/229494},
      title = {Mineral resources of the Big Horn Mountains wilderness  study area, Maricopa County, Arizona /},
      publisher = {GPO ;},
      recid = {229494},
      pages = {v, 14 p. :},
      address = {Washington :},
      year = {1987},
}