@article{28559,
      author       = "Cohen, Benjamin R. and 11th Conference of the International
                      Cartographic Association.ICA Warsaw, July 29. - August 4.
                      1982",
      title        = "School Atlases in the People's Republic of  Bulgaria.
                      History, Situation and Problems. 11th Conference of the
                      International Cartographic Association. Warsaw, July 29 -
                      August 4. 1982  ",
      year         = "1982",
      note         = "1 sv.",
}