@article{24860,
      author = {Schuberth, Christopher J.},
      url = {http://library.usi.edu/record/24860},
      title = {Fluorspar mining district, Cave-in-Rock and Shawnee  National Forest /},
      publisher = {Education Section, Illinois State Museum,},
      recid = {24860},
      pages = {42 p. :},
      address = {Springfield :},
      year = {1979},
}