Conferences held in USSR
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Novosibirsk, USSR, 25–28 September 1991
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Alma-Ata, USSR, 23–28 September 1991
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Moscow, USSR, 23–27 June 1991
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Alma-Ata, USSR, 18–22 September 1989
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Novosibirsk, USSR, 18–22 September 1989
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Moscow, USSR, 13–17 November 1988
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Dubna, USSR, 23–27 September 1980
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Moscow, USSR, 25–30 June 1973
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Tallinn, USSR, 28 May–1 June 1973
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Moscow, USSR, 16–22 August 1971
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Riga, USSR, 21–27 June 1970
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Moscow, USSR, 15–18 July 1965
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Moscow, USSR, 12–18 July 1965