000 00320nam a2200133Ia 4500
005 20250612122300.0
008 250601s1996 xx 000 0 eng d
020 _a8170247233
100 _aDr N. venkataiah
245 0 _aEducational Technology
260 _aNew delhi
_bAPH Pub.
_c1996
300 _a234
942 _2ddc
_cBK
999 _c2797
_d2797