00274nam a2200109 a 450000500170000002000150001708200170003210000190004924500400006826000380010830000180014620251203091810.0  a8170291070  a005,bD, pra  aPrata, Stephen  aAdvanced Unix: a programmer's guide  aNew DelhibBPB Publicationsc1996  ax,484p.c22cm