@article{67967,
      author = {Treworgy, Colin G. and Bargh, Margaret H.},
      url = {http://library.usi.edu/record/67967},
      title = {Deep-minable coal resources of Illinois /},
      publisher = {Illinois State Geological Survey,},
      recid = {67967},
      pages = {65 p. :},
      address = {Champaign, Ill. :},
      year = {1982},
}