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Before Sudoku: The World of Magic Squares [Buy it!] | Block, Seymour S; Tavares, Santiago A | USD 27.13 (Sun May 26 12:15:24 2024) | Abebooks | Lucky's Textbooks | ISBN10: 0195367901, ISBN13: 9780195367904, [publisher: Oxford University Press] Softcover [Dallas, TX, U.S.A.] [Publication Year: 2009] |