@article{216288,
      recid = {216288},
      author = {Milici, Robert C.,},
      title = {The COALPROD database : historical production data for the  major coal-producing regions of the conterminous United  States /},
      publisher = {U.S. Geological Survey,},
      address = {[Reston, VA] :},
      pages = {[2], 18 leaves ;},
      year = {1997},
      note = {Imprint from transmittal sheet.},
      url = {http://library.usi.edu/record/216288},
}