00807nam0-22002891i-450-990002578930403321000257893FED01000257893(Aleph)000257893FED0100025789320000920d1956----km-y0itay50------baENGAmerican Mathematical Society TranslationsBy A.M.S.ProvidenceA.M.S.1956.iii, 26 cmAMS translationsSerie 23Atti di convegni510American Mathematical Society441587ITUNINARICAUNIMARCBK990002578930403321MXXXI-A-4914193MASMASAmerican Mathematical Society Translations436075UNINAING01