@article{62110,
      author = {Collinson, Charles William. and Scott, Alan Johnson,},
      url = {http://library.usi.edu/record/62110},
      title = {Age of the Springville shale (Mississippian) of Southern  Illinois},
      recid = {62110},
      pages = {12 p.},
      address = {Urbana,},
      year = {1958},
}