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    Associated Prime Number Magic Squares.Charles D. Shuldham - 1914 - The Monist 24 (3):472-475.
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  2. Paneled Magic Squares.Charles D. Shuldham - 1914 - The Monist 24 (4):613-617.
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  3. (1 other version)Scientia.Charles D. Shuldham - 1914 - The Monist 24:476.