00345nam a22001217a 450000500170000000800410001702000150005805000160007310000170008924500470010626000450015330000250019820260410123812.0260410b        |||||||| |||| 00| 0 eng d  a0393035050  aQC6.T5 1993  aThorne, K S   aBlack holes and Time warps /cThorne, K S   aNew yorkbW . W . NORTON & COMPANYc1994  axix, 619p, ;illbhbk