@article{24724,
      author       = "Kopylova, A. D. and Sixieme Conference de l´Association
                      Cartographique Internationale, Ottawa, Canada, Aout 1972",
      title        = "Procede d´Impression des Cartes Multicolores avacle Nombre
                      Minimal de Couleur  ",
      year         = "1972",
      note         = "1 seš.",
}