@article{20589,
      author = {Busch, Willis L.},
      url = {http://library.usi.edu/record/20589},
      title = {Mineral production in Illinois in 1957 /},
      publisher = {Illinois State Geological Survey,},
      recid = {20589},
      pages = {39 p. :},
      address = {Urbana :},
      year = {1958},
}