000 00409 a2200157 4500
005 20250829155203.0
082 _a372.72044
_bSTC
100 _aStern, Catherine
_956680
245 _aChildren discover arithmetic
_b: an introduction to structural arithmetic
260 _aLondon:
_bGeorge. G. Harrap,
_c1953.
300 _a295p.
500 _aHB
546 _aEng
650 _aArithmetic
_947008
942 _cBK
999 _c24954
_d24954