@article{15840,
      author = {Wanless, Harold R.},
      url = {http://library.usi.edu/record/15840},
      title = {Geology and mineral resources of the Beardstown, Glasford,  Havana, and Vermont quadrangles.},
      recid = {15840},
      pages = {233 p.},
      address = {Urbana,},
      year = {1957},
}