@article{19235,
      note = {"Reprinted from the Journal of geology, vol.56, no.1,  January, 1948."},
      author = {Leighton, Morris M. and Ekblaw, George Elbert, and  Horberg, Leland,},
      url = {http://library.usi.edu/record/19235},
      title = {Physiographic divisions of Illinois,},
      recid = {19235},
      pages = {16-33 p.},
      address = {Urbana,},
      year = {1948},
}