00517nam a22001817a 450000500170000001000290001702000230004603500270006903700130009603700150010908200130012410000200013724500480015726000420020527000630024730000220031070000030033220110628104948.0  aENG-102869  B-445902-913  a818781893Xc350.00  aEN-86402  B-445902-913  bDBAD/PUB  bAllied/Ven  a371.3078  aAggarwal, Vijay  aEducational technology /cby Vijay Aggarwal  aNew DelhibLakshay Publicationsc2011  a7/26, G.Floor, Ansari Road, Darya ganj bNew Delhie1100022 a296p c22cm (pbk)