Conference of Non-Aligned Nations (1964, Cairo)(1)
Iwaszkiewicz, Jarosław (1894-1980)(1)
Januszewski, Zygmunt (1956-2013)(1)
Pugwash Conference on Science and World Affairs (13, 1964, Karlovy Vary)(1)
Pugwash Conference on Science and World Affairs (17. : 1967 : Ronneby) (1967-)(1)
Pugwash Conference on Science and World Affairs (22, 1972, Oxford)(1)