@article{27102,
      author       = "Hsu, H.T. and 20. General Assembly IUGG, Vienna, 11-24
                      August 1991",
      title        = "Report of Commission 5, IAG. To the 20th IUGG General
                      Assembly. (1987 - 1991)  ",
      year         = "1991",
      note         = "Liter.",
}