000 00320nam a2200121Ia 4500
008 241226s9999 xx 000 0 und d
020 _a9788183166669
082 _a371.3
_bVAN
100 _aVanaja, M.
245 0 _aEducational Technology
260 _aHyderabad
_bNeelkamal Publications Pvt. Ltd.
_c2016
300 _a308.
999 _c178691
_d178691