000 00304nam a2200121Ia 4500
008 220901s2014 xx 000 0 eng d
082 _a371.33 AGG
100 _aAggarwal, J.C.; Gupta, S.
245 0 _aElementry Educational Technology
260 _bDelhi: Shipra
_c2014
300 _a151
942 _2ddc
_cBK
999 _c7363
_d7363