000 00307nam a2200133Ia 4500
005 20250612122134.0
008 250601s1996 xx 000 0 eng d
020 _a8170247233
100 _aN.venkataiah
245 0 _aEducational technology
260 _aNew Delhi
_bECR
_c1996
300 _a265
942 _2ddc
_cBK
999 _c37
_d37