00470nam a2200145Ia 4500020001500000082001900015100004000034245003500074260004800109300002900157490004600186500005600232500000500288700003100293  a0691050848  a530.1bH393.NS  aHawking, Stephen and Penrose, Roger  aThe nature of space and timeb  aPrincetonbPrinceton University Pressc1996  aviii, 141p. Bibl. Index.  aIssac Newton Institute series of lectures  a"Purchased under NBHM grant for the year 2003-2004"  a  aPenrose, Roger ; jt. auth.