@article{64731,
      note = {Cover title.},
      author = {McGinnis, Lyle D.},
      url = {http://library.usi.edu/record/64731},
      title = {The Gravity field and tectonics of Illinois /},
      publisher = {Illinois State Geological Survey,},
      recid = {64731},
      pages = {28 p. :},
      address = {Urbana :},
      year = {1976},
}