000 00343nam a2200145Ia 4500
020 _a1-85270-004-1
082 _bT60
_a510
100 _a"Ruth Merttens"
245 0 _aMultiplying and Divinding
260 _bOctopus Publishing Group
_c1987
300 _a23
944 _cTB
999 _c472013
_d472013