@article{19217,
      author = {Dyni, John R.},
      url = {http://library.usi.edu/record/19217},
      title = {Relation of the carbon/oxygen ratio in coal to igneous  intrusions in the Somerset coal field, Colorado /},
      publisher = {U.S. Govt. Print. Off.,},
      recid = {19217},
      pages = {iv, 20 p. :},
      address = {Washington :},
      year = {1980},
}