01000nam0-22003131i-450-9900011060304033210-521-38428-1000110603FED01000110603(Aleph)000110603FED0100011060320000920d1990----km-y0itay50------baengGeneral Relativity and Gravitation, 1989Proceedings of the 12th International Conference, University of Colorado at Boulder, July 2-8, 1989Edited by Neil Ashby, David F. Bartlett and Walter WyssCambridge [etc.]Cambridge University Press1990RelativitàGravità530.11Ashby,Neil52778Bartlett,David F.Wyss,WalterITUNINARICAUNIMARCBK99000110603040332123-20318099FI1FI1General Relativity and Gravitation, 1989337597UNINAING01