000 00304nam a2200121Ia 4500
008 170912s9999 xx 000 0 und d
082 _a310 HEL/ E HEL/E
100 _aHELEN M WALKER
245 0 _aELEMENTARY STATISTICAL METHODS
260 _bTHE UNIVERSITY OF CHICAGO
_c1974
300 _a302
942 _cTB
999 _c4686
_d4686