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Pugwash Conferences on Science and World Affairs / Central Office (London) (6)
Pugwash Conference on Science and World Affairs (22, 1972, Oxford)(3)
National Academy of Sciences (Washington, DC) (1863-)(1)
Pugwash Conference on Science and World Affairs (1957-)(1)
Pugwash Conference on Science and World Affairs (32. : 1982 : Warschau) (1982-)(1)
Zentral- und Landesbibliothek Berlin (6)
Brief (6)