000 00282nam a2200097Ia 4500
008 230915s9999 xx 000 0 und d
050 _aQA135.6.B55 2012
100 _aRICK BILLSTEIN
245 2 _aA PROBLEM SOLVING APPROACH TO MATHEMATICS: ELEMENTARY SCHOOL TEACHERS
942 _cBK
999 _c185158
_d185158