@article{8770,
      author = {Perry, Thomas G.},
      url = {http://library.usi.edu/record/8770},
      title = {Salem limestone and associated formations in south-central  Indiana /},
      publisher = {Geological Survey,},
      recid = {8770},
      pages = {330 p. :},
      address = {Bloomington :},
      year = {1954},
}