@article{10412,
      note = {At head of title: State of Illinois.  Department of  Registration and Education.},
      author = {Clegg, Kenneth Edward.},
      url = {http://library.usi.edu/record/10412},
      title = {Subsurface geology and coal resources of the Pennsylvanian  system in Clark, and Edgar Counties, Illinois /},
      publisher = {Illinois State Geological Survey,},
      recid = {10412},
      pages = {28 p. :},
      address = {Urbana :},
      year = {1965},
}