@article{196984,
      note = {Cover title.},
      author = {Gray, J. E. and Coolbaugh, M. F. and Plumlee, G. S.},
      url = {http://library.usi.edu/record/196984},
      title = {Geologic framework and environmental geology of the  Summitville, Colorado acid-sulfate mineral deposit  [microform] /},
      publisher = {U.S. Dept. of the Interior, U.S. Geological Survey :},
      recid = {196984},
      pages = {29 leaves :},
      address = {Denver, CO :},
      year = {1993},
}