@article{9494,
      recid = {9494},
      author = {Gluskoter, Harold J.},
      title = {Trace elements in coal : occurrence and distribution /},
      publisher = {Illinois State Geological Survey,},
      address = {Urbana :},
      pages = {154 p. :},
      year = {1977},
      url = {http://library.usi.edu/record/9494},
}