000 002670000a22001210004500
008 160502b1944 xxu||||| |||| 00| 0 eng d
041 _aeng
080 _a511:371.3
_bP6
942 _cBK
100 _aPotter, F.F.
245 _aThe teaching of authmetic
260 _c1944
999 _c8474
_d8474