Martin's Equation Tables: Designed to Furnish Merchants, Manufacturers and Other Business Men, with an Accurate Set of Calculations for Averaging Accounts, and Enabling the Book-keeper to Perform, with Great Facility and Despatch, what Has Hitherto Been a Tedious Process in the Sciences of Equations

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Erastus Darrow & Brother, 1854 - Average of accounts - 86 pages
 

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