000 00281nam a2200097Ia 4500
008 160930s9999 xx 000 0 und d
100 _aSingh, Y. K., Sharma, T. K. and Upadhyay, Brijesh
245 _aEducational Technology : teaching learning
260 _aNew Delhi
_bAPH
942 _cBK
999 _c5210
_d5210