"Protecting the Environment",
legal study congress organised for the Autonomous Region of Sardegna
(Cagliari, 19th-21st April 1989 - Hotel Mediterraneo).
"Cartography as an
instrument for territorial administration", study seminar,
by the Autonomous Region of Sardegna - Council for local business,
finance and town-planning (Arzachena, 21st April 1989 - Hotel Porto