@article{17231,
      recid = {17231},
      author = {Bristol, Hubert M. and Buschbach, T. C.},
      title = {Ordovician Galena Group (Trenton) of Illinois : structure  and oil fields /},
      publisher = {Illinois State Geological Survey,},
      address = {Urbana :},
      pages = {38 p. :},
      year = {1973},
      note = {Cover title.},
      url = {http://library.usi.edu/record/17231},
}