000 00310nam a2200121Ia 4500
008 250224s9999 xx 000 0 und d
020 _a729100855
082 _a510.7WAT
100 _aWatson F.R
245 0 _aDevelopments in Mathematical Teaching
260 _bOpen Books Publishing Ltd
_c1976
942 _cBK
999 _c442076
_d442076