Mathematical Mysteries: The Beauty and Magic of Numbers by Clawson, Calvin C.

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Mathematical Sorcery by Clawson, Calvin C.

Mathematical Sorcery Paperback Calvin C. Clawson

Mathematical Mysteries: The Beauty and Magic of Numbers by Clawson, Calvin C.

Mathematical Sorcery: Revealing - Paperback, by Clawson Calvin C. - Acceptable

The Mathematical Traveler: - Paperback, by Clawson Calvin C. - Very Good