000 00249nam a2200097Ia 4500
008 230915s9999 xx 000 0 und d
050 _aQA 11 .A1 D48 1973
100 _aHOWSON ,A.G.
245 0 _aDEVELOPMENTTS IN MATHEMATICAL EDUCATION
942 _cBK
999 _c181982
_d181982