TY  - BOOK
AU  - Al-Khalili, J
TI  - Blackholes wormholes and time machines
SN  - 9780750305600
U1  - 524.882 
PY  - 1999///
CY  - New York
PB  - Taylor and francis
KW  - BLACK HOLES
KW  - TIME MACHINES
KW  - WORM HOLES
ER  -