TY  - BOOK
AU  - Hawking,Stephen
AU  - Penrose,Roger
TI  - The nature of space and time / 
SN  - 0915642112
U1  - 530.11 
PY  - 1997///
CY  - New Delhi : 
PB  - Oxford University Press , 
KW  - RELATIVITY(PHYSICS)
N1  - NULL
ER  -