000 00300nam a2200121Ia 4500
008 220201s1958 xx 000 0 eng d
082 _a510
_bTOF
100 _aToft
245 0 _aPractical mathematics definations & formula
260 _bLondon: Sir Isaac Pitman
_c1958
300 _a38
942 _2ddc
999 _c70499
_d70499