@article{9499,
      author = {Wier, Charles E. and Hutchison, Harold C.},
      url = {http://library.usi.edu/record/9499},
      title = {Reduction of sulfur in Indiana coal by washability  techniques /},
      publisher = {State of Indiana, Dept. of Natural Resources, Geological  Survey,},
      recid = {9499},
      pages = {61 p. :},
      address = {Bloomington :},
      year = {1977},
}