00792nam0-22002771i-450-9900039470104033210-89838-242-4000394701FED01000394701(Aleph)000394701FED0100039470120030317d1988----km-y0itay50------bausaUSX-Efficiency: theory, evidence and applicationsKluwer academic publishersBoston227 p.con grafici23 cmFrantz,Roger S.129246ITUNINARICAUNIMARCBK990003947010403321D2.11392DECTSDECTSX-Efficiency: theory, evidence and applications513851UNINA