00471nam a2200157 a 450000500170000008200180001710000240003524500480005926000590010730000230016663000140018996400160020399700170021999900150023695200620025120251202164233.0  a372.0285bELL  aEllingham, D. W. W.  aHandbook of primary education and computing  aTunbridge Wells, KentbCastle House Publicationsc1984  a156 p.b22 cm.cHB  aEducation  bcdefg_  a7602 LIBSS C  c4418d4418  00104070aPUbPUd1998-04-09l0o372.0285 ELLp7602yBK