@article{5036,
      url = {http://library.usi.edu/record/5036},
      title = {Papers presented at the Quarter centennial celebration of  the Illinois State Geological Survey.},
      publisher = {State Geological Survey,},
      recid = {5036},
      pages = {300 p. :},
      address = {Urbana,},
      year = {1931},
}