Authors: Charles Guilford Burnham

  • Burnham’s Arithmetic, Revised a New System of Arithmetic, on an Improved Plan Embracing the Rules of Three, Single and Double, Direct and Inverse . . — Charles Guilford Burnham

    Burnham’s Arithmetic, Revised a New System of Arithmetic, on an Improved Plan Embracing the Rules of Three, Single and Double, Direct and Inverse . . — Charles Guilford Burnham

  • A New System of Arithmetic, On an Improved Plan, Embracing the Rules of Three … And All Proportional Questions in One Rule Applicable to the Whole, the Process Greatly Simplified and Abridged — Charles Guilford Burnham

    A New System of Arithmetic, On an Improved Plan, Embracing the Rules of Three … And All Proportional Questions in One Rule Applicable to the Whole, the Process Greatly Simplified and Abridged — Charles Guilford Burnham