000 00281nam a2200097Ia 4500
008 160930s9999 xx 000 0 und d
100 _aBhatt, B.D and Sharma, S.K
245 _aEducational Technology: Concepts and Technique
260 _aNew Delhi
_bKrishna Publ. & Distr.
942 _cBK
999 _c4039
_d4039