000 00302nam a2200109 4500
245 _aMathematics essential for elementary statistics
_cbyHelen M Walker
100 _aWalker, Helen M
250 _a2nd ed.
260 _aCalcutta
_bOxford and IBH
_c1951
300 _axiii,382p.; 20cm.-
082 _a519.4
_bWAL
999 _c18420
_d18420