00805nam2-22003011i-450-99000090023040332120001010000090023FED01000090023(Aleph)000090023FED0100009002320001010d--------km-y0itay50------baitay-------001yyVol.6MoscowEAEE1990.p.251ill.cm 280010000889612001Proceeding of the Ninth European Conference on Earthquake Engineering6Dinamica , SismicaProceedings492455ITUNINARICAUNIMARCBK990000900230403321000090023000001IINTCIINTCVol.6357683UNINAING01