00400nam a2200181Ia 4500003000400000005001700004008004100021020001800062040000700080041000800087082001700095100001700112245002700129260002000156300000900176650001400185700001900199OSt20251212115003.0250729s2004    xx            000 0 und d  a9788171003570  cAL  aeng  a371.333 VENE  aVenkataiah N  aEducational technology  aNew Delhic2004  a234p  aEducation  aRao Digumurthi