00309nam a2200109 a 450000500170000000800410001704100080005810000170006624500610008326400440014430000110018820260716124435.0260701s1978    ii            000 0 eng d  aeng1 aLocke, Flora10aElectronic calculators for business use /cLocke, Flora. 1aNew York :bJohn wiley and sons,c1978.  a264 p.