000 00313nam a2200133Ia 4500
008 240201s1999 xx 000 0 eng d
020 _a9 780435169756
082 _a510 HEI
245 0 _aNHM-2 - ADDITION AND SUBTACTION TO 20
260 _bHEINEMANN
_c1999
300 _a39
650 _aMATH
942 _2ddc
_cBK
999 _c15732
_d15732