TY  - BOOK
AU  - Al-Khalili, Jim
TI  - Black holes wormholes and time machines
SN  - 0-7503-0560-6
U1  - 530.11 
PY  - 1999///
CY  - Bristol
PB  - Institute of Physics
KW  - Space and time
N1  - Includes bibliography and index
ER  -