000 00273nam a22001217a 4500
999 _c5250
_d5250
020 _a812612041x
082 _a371.33 TAR;1
100 _aTara Chand
245 _aEducational technology /
_cTara Chand
260 _aNew Delhi :
_bAnmol
_c2006
300 _a415 p.
942 _cSTS