000 00291 a2200121 4500
082 _a372.73
_bRON
100 _aRodda, G. W.
_9207952
245 _aNew Mathematics
_cG. W. Rodda
_b: understanding numbers
260 _aLondon:
_bNelson,
_c1970.
300 _a59p.
546 _aeng
942 _cBK
999 _c67149
_d67149