@conference{121446,
  author = {Marc Weiss and Victor Zhang and W Lewandowski and P Uhrich and D Valat},
  title = {NIST and OP GPS Receiver Calibrations Spanning Twenty Years: 1983-2003},
  year = {2004},
  month = {2004-01-01},
  publisher = {18th Annual European Frequency and Time Forum , Surrey, UK},
  language = {en},
}