000 00286nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aSingh, UdayaBhan
245 0 _aSankhiyaki Vishlashan Graph Evam Aarakh
260 _aNew Delhi
_bTata Mc Graw
_c2009
300 _a19.50p.
942 _cBK
999 _c11976
_d11976