Describes how an abacus can be used as a calculating tool and shows how to use an abacus to add numbers.
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Patricia A. Murphy, former vice president of the Epilepsy Advocacy Council of Long Island, currently edits the "Epilepsy Wellness Newsletter", a publication providing alternative health information for people with seizure disorders.
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Softcover. Condition: Good. Murphy, Patricia J. Seller Inventory # SONG0823988805
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