@article{24979,
      author       = "Symposium Sofia, 31. VIII. - 7. IX. 1969",
      title        = "Programme du symposium international sur les réseaux
                      continentaux. Sofia, 31. VIII. - 7. IX. 1969  ",
      year         = "1969",
      note         = "1 seš., International Symposium on Continental Networks,
                      Sofia 1969",
}