@article{54561,
      recid = {54561},
      author = {Gluskoter, Harold J. and Simon, Jack Aaron,},
      title = {Sulfur in Illinois coals},
      publisher = {Illinois State Geological Survey,},
      address = {Urbana,},
      pages = {28 p.},
      year = {1968},
      url = {http://library.usi.edu/record/54561},
}