000 00281nam a2200097Ia 4500
008 230915s9999 xx 000 0 und d
050 _aQA135.5.B55 1997
100 _aBILLSTEIN,RICK
245 2 _aA PROBLEM SOLVING APPROACH TO MATHEMATICS FOR ELEMENTRY SCHOOL TEACHERS
942 _cBK
999 _c185042
_d185042