00313nam a2200109 a 450000500170000008200180001710000240003524500480005926000590010730000230016663000140018920251202164233.0  a372.0285bELL  aEllingham, D. W. W.  aHandbook of primary education and computing  aTunbridge Wells, KentbCastle House Publicationsc1984  a156 p.b22 cm.cHB  aEducation