@article{533,
      author       = "Marsch, J. G. and Douglas, B. C. and Klosko, S. M. and IUGG
                      - IAG, 15th General Assembly Moscow, 1 - 14 August 1971",
      title        = "A unified set of tracking station coordinates  ",
      year         = "1971",
      note         = "1 sv.",
}