@article{30877,
      author = {Johnson, W. Hilton},
      url = {http://library.usi.edu/record/30877},
      title = {Stratigraphy and petrography of Illinoian and Kansan drift  in central Illinois.},
      publisher = {Illinois State Geological Survey,},
      recid = {30877},
      pages = {38 p.},
      address = {Urbana,},
      year = {1964},
}