000 00327nam a2200121Ia 4500
008 250224s9999 xx 000 0 und d
020 _a9780470412534
082 _a510.72RUB
100 _aRubenstein Rita N
245 0 _aTeaching And Learning Middle Grdes Mathematics
260 _bKey College Publishing
_c1999
942 _cBK
999 _c465124
_d465124