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Calvin Tracy

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A New System of Arithmetic In Which Is Explained and Applied to Practical Purposes, in Addition to the Ordinary Rules of Operation, the Principle of Canceling, Being an Abbreviated Mode of Arithmetical Solution; Designed for Schools and Academies
A New System of Arithmetic In Which Is Explained and Applied to Practical Purposes, in Addition to the Ordinary Rules of Operation, the Principle of Canceling
Calvin Tracy — Books & Biography | Menrva Books