Sessions location and date: # 1: Milan, September 22, 1958. # 2: Milan, March 15, 1959. # 3: Milan, 1960. # 4: Milan, September 1, 1961. # 5: Milan, 1963. # 6: Marina di Carrara, Universal Club, Summer 1968. # 7: Teatro Lirico, Milan, October 27, 1969. # 8, 9: Teatro Zandonai, Rovereto, January 25, 1975. # 10: Milan, May 1972. # 11: La Spezia, May 1992. # 12: Teatro La Scala, Milan, December 1965. # 13: Teatro San Fedele, Milan, May 6, 1987. # 14: Sori, July 5, 1991.