Mount Etna: The anatomy of a volcano - D.K. Chester, A.M. Duncan, J.E. Guest, C. Kilburn - Google Books

https://books.google.de/books?id=KKK-BwAAQBAJ

Since the Second World War interest in the active by Italian geophysicists; studies of ground deform volcano Mount Etna, in Sicily, has been steadily ation by British and Italian groups; measurements increasing. This interest has not been restricted of…