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Pugwash Conference on Science and World Affairs (22, 1972, Oxford) (8)
Pugwash Conference on Science and World Affairs (1957-)(4)
Pugwash Conferences on Science and World Affairs / Central Office (London)(3)
B. H. Blackwell Ltd (Oxford) (1926-)(1)
Deutsche Akademie der Wissenschaften zu Berlin (1946-1972)(1)