00815nam0-22003011i-450-9900014384604033210-521-63976-X000143846FED01000143846(Aleph)000143846FED0100014384620000920d1999----km-y0itay50------baengGeneral RelativityA Geometric ApproachMalcolm LudvigsenCambridgeCambridge University Pressc1999xii, 217 p.26 cmRelativitàGravità530.11Ludvigsen,Malcolm62233ITUNINARICAUNIMARCBK99000143846040332123-2696371 D.S.F.FI1FI1General Relativity374500UNINAING01