00325nam a2200133 a 450000500170000002000150001708200150003210000180004724500330006525000120009826000390011030000200014970000220016920251203110929.0  a817758765X  a006.6bHEA  aHearn, Donald  aComputer graphicsbC version  a2nd ed.  aNew DelhibPearson Educationc1997  a660p.c24 cm.PB  aBaker, Pauline. M