@article{33267,
      recid = {33267},
      author = {Johnson, Wilton.},
      title = {Abandoned coal-mined lands : nature, extent and cost of  reclamation /},
      publisher = {U.S. Bureau of Mines,},
      address = {[Washington] :},
      pages = {29 p. :},
      year = {1979},
      url = {http://library.usi.edu/record/33267},
}