@article{2424,
      note = {Cover title.},
      author = {Helfinstine, Roy John.},
      url = {http://library.usi.edu/record/2424},
      title = {Sulfur reduction of Illinois coals--washability studies},
      recid = {2424},
      pages = {2 v.},
      address = {Urbana,},
      year = {1971},
}