00625nam a2200229 a 4500 0521484863 (pbk.) MAIN QC21.2 Ridley, B. K. Time, space and things / B.K. Ridley. 3rd ed. Cambridge : Cambridge University Press, 1995. x, 191 p. : ill. ; 22 cm. Includes index. Physics Popular works. .b10032356 09-03-04 17-04-03 20230123133555.0 NUST BOOKS QC21.2 150947 150947