Conferences held in 1966
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Budapest, Hungary20–23 April 1966
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Helsinki, Finland24–27 May 1966
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Trondheim, Norway23–25 June 1966
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Stockholm, Sweden26 June–2 July 1966
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Ann Arbor, Michigan, USA21–24 August 1966
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Kyoto, Japan14–17 September 1966
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Tokyo and Kyoto, Japan28 September–4 October 1966