@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", }