@article{155053,
      author = {Treworgy, Colin G. and Hindman, Carol A.},
      url = {http://library.usi.edu/record/155053},
      title = {The proximity of underground mines to residential and  other built-up areas in Illinois /},
      publisher = {Illinois State Geological Survey,},
      recid = {155053},
      pages = {18 p. :},
      address = {Champaign, Ill. (615 E. Peabody Dr., Champaign 61820) :},
      year = {1991},
}