000 00274nam a2200109Ia 4500
008 220321s9999 xx 000 0 und d
100 _aSwarupa Rani
245 0 _aResearch in teaching of Mathematics
260 _aDelhi, Publication A.P.H
_c2011
300 _a92
942 _cRF
999 _c9209
_d9209