TY - BOOK AU - Al-Khalili Jim TI - Black holes, wormholes and time machines SN - 0750305606 (pbk) U1 - B965, N9 PY - 1999/// CY - Bristol PB - Institute of Physics Publishing KW - Black holes KW - Stars KW - Astronomy N1 - Bibliography 254-258p; Index 259-265p ER -