000 00315nam a2200145Ia 4500
008 220421s9999||||xx |||||||||||||| ||und||
020 _c595
040 _aBED
100 _aSingh, Y K
245 0 _aInst. Technology in Education
260 _bAPH PUB.
_aNew Delhi
300 _a263
500 _a3212
942 _cBK
999 _c3212
_d3212