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Proceedings of the 28th Pugwash Conference on Science and World Affairs "Global Aspects of Disarmament and Security", Varna, Bulgaria, 1st - 5th Sptember 1978. L., 1979.
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Proceedings of the 28th Pugwash Conference on Science and World Affairs "Global Aspects of Disarmament and Security", Varna, Bulgaria, 1st - 5th Sptember 1978. L., 1979.
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