@article{21695,
      author       = "Williams, Brigadier E.P.J. and International Cartographic
                      Association. Commission III - Automation in Cartography.
                      Working Session and Business Meeting 21-26 August, 1973
                      Budapest, Hungary",
      title        = "The Ordnance Surwey System for pre-Editing and Digitising
                      Large Scale Plans  ",
      year         = "1973",
      note         = "Obr. a tab. na příl., 1 sv., separáty",
}