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The puzzle instinct the meaning of puzzles in human life /
Publicado 2002An electronic book accessible through the World Wide Web; click to view
Electrónico eBook -
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Retrain your business brain outsmart the corporate competition /
Publicado 2003An electronic book accessible through the World Wide Web; click to view
Electrónico eBook -
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Riddles of the sphinx and other mathematical puzzle tales
Publicado 1987An electronic book accessible through the World Wide Web; click to view
Electrónico eBook