TY  - BOOK
AU  - Stephen Hawking
AU  - Roger Penrose
TI  - The nature of space and time
SN  - 9780195642117
U1  - 530.11 
PY  - 1998///
CY  - New Delhi
PB  - Oxford University Press
KW  - Space
KW  - Time
KW  - Physics
KW  - Science
ER  -