000 00336nam a2200133Ia 4500
008 230627s9999 xx 000 0 und d
040 _aNORSU-Sia
_cNORSU-Sia
082 _a510.71 So8796
100 _aSouthall, Ed
245 0 _aYES, BUT WHY? TEACHING FOR UNDERSTANDING IN MATHEMATICS
260 _c2017
300 _a324
999 _c3242
_d3242