@article{1696,
      author       = "Yumi, Shigeru and International Polar Motion Service",
      title        = "Annual Report of the International Polar Motion Service for
                      the Year 1971  ",
      year         = "1973",
      note         = "1 brož., čet. obr. - Published for the International
                      Council of  Scientific Unions with the Financial Assistance
                      of the UNESCO",
}