000 003140000a22001450004500
060 _a100
082 _a513.024 62 CAS
100 _aCastle, Frank
245 _aWorkshop arithmatic
260 _aLondon, Macmillan Co
260 _c1954
300 _a185
650 _aFractions/ averages/ ratio
942 _cBK
999 _c221977
_d221977