@article{218611,
      recid = {218611},
      author = {Tewalt, Susan J.},
      title = {National coal resource assessment methodology comparison  of resource calculation methods by two geographic  information systems (GIS) / [microform] :},
      publisher = {U.S. Dept. of the Interior, U.S. Geological Survey,},
      address = {[Reston, Va.?] :},
      pages = {6 leaves :},
      year = {1998},
      note = {Cover title.},
      url = {http://library.usi.edu/record/218611},
}