D-STAT A software for learning/teaching descriptive statistics (in Italian, to buy) Autors: F. Bartolucci, G. Cicchitelli, G. Galmacci  © CIRDIS, Perugia (in Italiano, a pagamento) Distribution by Edizioni Scientifiche Italiane S.p.A., Via Chiatamone, 7 80121 NAPOLI Tel. 081/7645443 PBX - Fax 081/7646477 Sito Web: www.esispa.com - Email: info@esispa.com