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Stuttgart, Federal Republic of Germany, 12–16 June 1979
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Rome, Italy, 18–21 June 1979
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Bratislava, Czechoslovakia, 3–6 July 1979
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Prague, Czechoslovakia, 9–12 July 1979
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Prague, Czechoslovakia, 16–19 July 1979
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Stockholm, Sweden, 20–25 August 1979
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Helsinki, Finland, 27–31 August 1979
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Zurich, Switzerland, 27 August–1 September 1979
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Zurich, Switzerland, 27 August–1 September 1979
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Lausanne, Switzerland, 29–31 August 1979
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Dubrovnik, Croatia, Yugoslavia, 3–5 September 1979
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University of Dijon, France, 3–7 September 1979
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Mainz, Federal Republic of Germany, 17–21 September 1979
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Halle (Saale), GDR, 17–21 September 1979
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Burzenin, Poland, 25–28 September 1979