| A Key to the Western Calculator, Containing the Solution of All the Examples and Questions for Exercise, with Reference to the Pages Where They Stand To Which Is Added, Some Useful Rules, Designed Chiefly to Facilitate the Labour of Teachers; and Assist | | | Author:
| Armstrong, John | | ISBN: | 978-0-243-14924-7 | | Publication Date: | Jan 2017 | | Publisher: | Forgotten Books
| | Book Format: | Paperback | | List Price: | USD $9.57 |
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