TY  - BOOK
AU  - Al-Khalili,Jim
TI  - Black holes, wormholes, and time machines
SN  - 9781439885604 (ebook : PDF)
PY  - 2012///
CY  - Boca Raton
PB  - CRC Press
KW  - Space and time
KW  - Popular works
KW  - Cosmology
N1  - "A Taylor & Francis book."; Includes bibliographical references (p. 177-178) and index
UR  - http://marc.crcnetbase.com/isbn/9781439885604
ER  -