@article{24749,
      author       = "First International Conference Fort Clayton, Canal Zone.
                      January 15 to 18. 1979",
      title        = "Proceedings. First International Conference on the
                      Redefinition of the North AmericanGeodetic Vertical Control
                      Network. Defense Mapping Agency Inter American Geodetic
                      Survey Cartographic School. Fort Clayton, Canal Zone.
                      January 15 to 18, 1979  ",
      year         = "1979",
      note         = "1 sv., četné for. obr. tb. a mapky v textu",
}