TY  - BOOK
AU  - Al-Khalili,Jim
TI  - Black holes, wormholes, and time machines
SN  - 9781439885598
PY  - 2012///
CY  - Boca Raton, FL
PB  - Taylor & Francis
KW  - Space and time
KW  - Popular works
KW  - Cosmology
N1  - Includes bibliographical references and index
ER  -