000 00215nam a2200097Ia 4500
100 _aMCKAY, TOFT L.
245 _aPRACTICAL MATHEMATICS
260 _aLONDON
_bSIR ISAAC PITMAN
_c1961
300 _a536
942 _2ddc
_cBB
999 _c71986
_d71986