000 00308nam a2200133Ia 4500
005 20250612122154.0
008 250601s1996 xx 000 0 eng d
020 _a817024733
100 _aN.Venkatiah
245 0 _aEducational technology
260 _aDelhi
_bAph pub.
_c1996
300 _a234
942 _2ddc
_cBK
999 _c603
_d603