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Santiago, Chile, 24–29 August 1997
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Vancouver, Canada, 18–23 August 1996
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Kyoto, Japan, 24–29 July 1994
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Lausanne, Switzerland, 19–24 July 1992
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Gera, GDR, 13–18 August 1990
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Broadbeach, Australia, 2–7 July 1989
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Porto, Portugal, 28 August–2 September 1988
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Nanjing, China, 26–31 July 1987
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Athens, Greece, 24–29 August 1986
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University of Colorado, Boulder, USA, 29 July–3 August 1984
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Budapest, Hungary, 23–27 August 1982
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Toulouse, France, 7–11 July 1980
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Prague, Czechoslovakia, 4–8 September 1978
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Sao Paulo, Brazil, 18–23 July 1977
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Hamburg, Federal Republic of Germany, 6–10 September 1976
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Dublin, Ireland, 19–24 August 1974
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Moscow, USSR, 25–30 June 1973
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Toronto, Canada, 22–28 June 1972
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Cracow-Zakopane, Poland, 14–22 September 1970
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Sydney, Australia, 20–27 August 1969
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Tokyo and Nikko, Japan, 12–16 September 1967
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Vienna, Austria, 7–11 September 1964
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Stockholm and Uppsala, Sweden, 25–29 June 1962