Rare book edited by Toyo Soroban Association: How to Learn Soroban (Abacus), Soroban, Shuzan (Abacus Calculation), Showa Era, Lessons, Mathematics, Old Book ‐ Mercari: Shop from Japan

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Rare book edited by Toyo Soroban Association: How to Learn Soroban (Abacus), Soroban, Shuzan (Abacus Calculation), Showa Era, Lessons, Mathematics, Old Book ‐ Mercari: Shop from Japan

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Rare book edited by Toyo Soroban Association: How to Learn Soroban (Abacus), Soroban, Shuzan (Abacus Calculation), Showa Era, Lessons, Mathematics, Old Book