000 00354nam a22001457a 4500
003 OSt
005 20220803105131.0
008 220803b ||||| |||| 00| 0 eng d
100 _aMangal S . K .
245 _aEducational Technology
260 _aLudhiana
_bTandon Publications
300 _aPage No.506
650 _2India Education
942 _2ddc
_cBK
999 _c1444
_d1444