00298nam a2200121Ia 450000500170000000800410001704100080005808200170006610000180008324500270010126000390012830000090016720260720174537.0260720s2005    xx            000 0 und d  aeng  a371.333 VENE  aVenkataiah, S  aEducational Technology  aNew DelhibAshish Publishingc2005  a212p