000 00316nam a2200145Ia 4500
008 220421s9999||||xx |||||||||||||| ||und||
020 _c700
040 _aBED
100 _aSingh, Vachan
245 0 _aEducational Technology
260 _bAakansha Pub.
_aNew Delhi
300 _a275
500 _a3174
942 _cBK
999 _c3174
_d3174