000 00263nam a2200097Ia 4500
008 190428s9999||||xx |||||||||||||| ||und||
100 _aBrueckner, L.J.
_97179
245 _aDiscovering meanings in arithmetic
250 _b1959. iv-442
260 _bHolt. New York, U.S.A.
999 _c7060
_d7060