@article{121020,
      recid = {121020},
      author = {Droste, John Brown, and Shaver, Robert Harold,},
      title = {Upper Silurian and Lower Devonian stratigraphy of the  Central Illinois Basin /},
      publisher = {State of Indiana, Dept. of Natural Resources, Geological  Survey,},
      address = {Bloomington, Ind. :},
      pages = {29 p. :},
      year = {1987},
      url = {http://library.usi.edu/record/121020},
}