000 00281nam a2200109Ia 4500
008 220201s1959 xx 000 0 eng d
100 _aGraham,LA
245 0 _aIngenions mathe problems & methods
260 _bNew Delhi:O.oner publication inc.
_c1959
300 _a237
942 _2ddc
999 _c71846
_d71846