00275nam a2200121 a 450000500170000002000150001708200150003210000200004724500150006725000130008226000350009530000230013020251203110125.0  a0789708434  a004.6bBRY  aBryce, James Y.  aUsing ISDN  aSpl. ed.  aINew DelhiianapolisbQUEc1996  axxiv,627p.c24 cm.