@article{90230,
      author = {Nelson, W. John.},
      url = {http://library.usi.edu/record/90230},
      title = {Geologic disturbances in Illinois coal seams /},
      publisher = {Illinois State Geological Survey,},
      recid = {90230},
      pages = {47 p. :},
      address = {Champaign, Ill. :},
      year = {1983},
}