00263nam a2200109 a 450000500170000002000150001708200200003210000230005224500310007526000250010630000220013120251203091942.0  a0521456851  a530.11,bD, Tou  aTourrenc, Philippe  aRelativity and Gravitation  aCambridgebCUPc1997  axiv,242p.c28 cm.