http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
lectures given at the Centro internazionale matematico estivo (C.I.M.E.) held in Varenna (Como), Italy, September 11-21, 1971
C.I.M.E. Summer School (1971 : Varenna, Italy)
Originally published: Firenze: Cremonese, 1971.