@article{235219,
      note = {Cover title.},
      url = {http://library.usi.edu/record/235219},
      title = {United States National Seismograph Network.},
      publisher = {U.S. Geological Survey's National Earthquake Information  Center,},
      recid = {235219},
      pages = {10 p. :},
      address = {Denver, Colo. :},
      year = {1991},
}