000 00272nam a2200121Ia 4500
008 170101s1961 xx 000 0 und d
082 _a517 S13W
100 _aSAWYER, W.W.
245 0 _aWhat is calculus about ?
260 _bN.Y.
_c1961
300 _a118p
942 _2ddc
_cB
999 _c8054
_d8054