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"Italian international conference on the thyroid", organised for Cagliari University - Faculty of Medicine and Surgery (Cagliari, 6th-7th December 1990 - Conference Centre Fiera Campionaria della Sardegna).
"Society, Citizens and reform in Italy today", given by the political community (Quartu S.Elena, 26th-27th November 1990 - Hotel Setar).
"Emigration and Immigration", Regional congress AITEF (Quartu Sant'Elena, 1st April 1990 - Hotel Setar).