000 00274nam a2200121Ia 4500
008 221121s9999 xx 000 0 und d
041 _aENGLISH
245 0 _aTEACHING OF MATHEMATICS
260 _bAPH PUBLICATION
300 _a129
650 _aNON FICTION
942 _cREF
999 _c177617
_d177617