@article{63020,
      author = {Templeton, Justus Stevens, and Willman, H. B.},
      url = {http://library.usi.edu/record/63020},
      title = {Champlainian series (Middle Ordovician) in Illinois},
      publisher = {State Geological Survey,},
      recid = {63020},
      pages = {260 p. :},
      address = {Urbana,},
      year = {1963},
}