00369nam a22001337a 4500008004100000040005500041080001600096100001800112245002200130260004400152300001100196650001400207653001400221230426b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  a530.145bN5  aSingh, Jagjit  aSpace time waltz   aNew Delhi: bWiley Eastern Ltd., c1995  a156p.   aUniverse   aCosmoses