George J. Summers

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Logical Deduction Puzzles (Official Mensa Puzzle Book S.)
Summers, George J.

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The Great Book of Mind Teasers and Puzzles
Summers, George J.

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� 2.89

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Brain Teasers (pocket puzzlers)

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� 2.73

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Test Your Logic: Fifty Puzzles in Deductive Reasoning (Dover Recreational Math)
Summers, George J.

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Mind Bafflers
Summers, George

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New Puzzles in Logical Deduction
Summers, George J.

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� 4.48

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Logic Puzzles
J. J. Mendoza Fernandez; George J. Summers; Norman D. Willis

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Juegos de ingenio 2
George J. Summers

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