@article{120903,
      recid = {120903},
      author = {Keefer, William R., and Hadley, R. F.},
      title = {Land and natural resource information and some potential  environmental effects of surface mining of coal in the  Gillette Area, Wyoming /},
      publisher = {U.S. Dept. of the Interior, Geological Survey,},
      address = {[Washington] :},
      pages = {vi, 27 p. :},
      year = {1976},
      url = {http://library.usi.edu/record/120903},
}