Political geography and productive geography between the valleys of the Albegna and the Fiora in northern Etruria - Attolini, Ida; Cambi, Franco 1957-; Castagna, Maria Antonietta; Celuzza, Mariagrazia; Fentress, Elizabeth 1948-; Perkins, Philip ca. 20./21. Jh; Regoli, Edina (1991)