@article{168,
      author       = "International Symposium on Photography and Navigation.
                      Columbus, Ohio, USA, May 25. - 28. 1970",
      title        = "The 1970 International Symposium on Photography and
                      Navigation. Columbus, Ohio, USA. May 25. - 28. 1970  ",
      year         = "1971",
      note         = "1 sv., 8 obr.",
}