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When: The Scientific Secrets of Perfect Timing. Title : When: The Scientific Secrets of Perfect Timing. Authors : Pink, Daniel H. Condition : Acceptable. The item is showing use from the previous owner but works perfectly.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.