@article{17740,
      author = {Bastin, Edson S.},
      url = {http://library.usi.edu/record/17740},
      title = {The fluorspar deposits of Hardin and Pope Counties,},
      publisher = {State Geological Survey,},
      recid = {17740},
      pages = {116 p. :},
      address = {Urbana,},
      year = {1931},
}