@article{24771,
      author       = "Proceedings of the American Congress on Surveying and
                      Mapping. 37th annual meeting. Washington, Febr. 27 - March
                      5, 1977",
      title        = "Proceedings of the American Congress on Surveying and
                      Mapping. 37th annual meeting. Washington, Febr. 27 - March
                      5, 1977  ",
      year         = "1977",
      note         = "1 sv.",
}