An introduction to general relativity / L. P. Hughston and K. P. Tod. Hughston, L. P., 1951- Tod, K. P. jt. aut. General relativity (Physics) QC173.6 .H84 1990 530.11 20 HUI Includes index. Cambridge ; New York : Cambridge University Press, c1990. c1990. 1990 Text 183 p. : eng London Mathematical Society student texts ; 5