000			00309nam a2200133Ia 4500
082			_a607.3 _bKUM
100			_aKumar, K.L.
245			_aEducational technology
260			_aNew Delhi _bNew Age International ( P ) Ltd. _c1997
300			_a344p.
650			_aApplied Sc.
650			_aEnglish
044			_aIndia
999			_c4446 _d4446