TY  - GEN
AU  - Al-Khalili, Jim
TI  - Black holes, wormholes and time machines
SN  - 9781439885598
U1  - 530.11 
PY  - 2012///
CY  - Boca Raton
PB  - CRC Press
KW  - Space and time
KW  - Cosmology
KW  - Black holes (Astronomy)
KW  - Space and time -- Popular works
KW  - Cosmology -- Popular works
N1  - Includes bibliographical references and index
ER  -