Balboni, Paolo Ernesto. Geografia d'Italia per stranieri / P. E. Balboni, M. Voltolina. - 1. ed. - Perugia : Guerra, 2005. - 143 p. : chiefly ill. (some col.), maps. ISBN: 8877157682 Subjects--Topical Terms: Italian regions. Subjects--Geographic Terms: Italy--Description and travel.Italy--Geography.