00318nam a2200121Ia 450000500170000000800410001704100080005808200170006610000140008324500520009726000380014930000090018720260720174816.0260720s2014    xx            000 0 und d  aeng  a371.333 SINE  aY k Singh  aEducational Technology : Management and Planing  aNew DelhibA P H PUBLISHINGc2014  a265p