000 00267nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aKulbir Singh Sidhu
245 0 _aTeaching of mathematics
260 _aNew Delhi
_bSterling Pub
_c1998
650 _aMath
942 _cBK
999 _c9900
_d9900