00366nam a2200121Ia 4500008004100000082002000041100001700061245004500078260003800123300002100161490004200182700002000224260720b        |||||||| |||| 00| 0 eng d  a530.1bSa121.GR  aSachs, R. K.  aGeneral relativity for mathematiciansb/  aNew York:bSpringer-Verlag,c1977  axii, 291p. Index  aGraduate texts in Mathematicsv v. 48  aWu, H.eauthor.