00431nam a2200121Ia 4500008004100000082001900041100002000060245005500080250000600135260000900141300000600150650015300156150614s9999    xx            000 0 und d  a509.24   HAW-B  aStephen Hawking  aBlackholes  and Baby Universes, AND OTHER ESSAYS,   a1  c1996  a0  aBlackholes  and Baby Universes and other essays,   Stephen Hawking, oxford and cambridge, , the origin of the universe, the future of the universe,