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Workshop of the INFN Eloisatron Project <23. ; 1992 ; Erice>
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International Workshop on Theoretical Physics <1992 ; Erice>
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Ecole internationale d'astrophysique Daniel Chalonge <Parigi>
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International Seminar on Nuclear War and Planetary Emergencies <14. ; 1992 ; Erice>
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International Seminar on Nuclear War and Planetary Emergencies <16 ; 1992 ; Erice>
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Convegno internazionale su La scoperta colombiana e la cultura europea contemporanea <1992 ; Erice>
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Italia : Provveditorato agli studi <Trapani> : Circolo didattico <2. ; Erice-Trentapiedi>
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