000 00304nam a2200121Ia 4500
001 12223
008 170722s9999 xx 000 0 und d
100 _aWilder, Raymond L.
245 _aEvolution of mathematical concepts :
_bElementary study /
260 _c1968.
653 _aMathematics
942 _cGEN
999 _c74932
_d74932