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Trachtenberg Speed System of Basic Mathematics
Do high-speed, complicated arithmetic in your head using the Trachtenberg Speed System.
156,00 DH
130,00 DH
Sur commande
Do high-speed, complicated arithmetic in your head using the Trachtenberg Speed System.
| ISBN / EAN | 9780285629165 |
|---|---|
| Auteur | Trachtenberg, Jakow |
| Editeur | Profile Books Ltd |