00752nam0-22002651i-450-990002726360403321000272636FED01000272636(Aleph)000272636FED0100027263620000920d1973----km-y0itay50------baENGBeta coefficients and index models of security return.by Aber John W.s.l.Boston University1973Aber,John W.111653ITUNINARICAUNIMARCBK990002726360403321C2-C5.205671DECTS4-504TBECADECTSECABeta coefficients and index models of security return427292UNINAING01