Description - How Long is a Second?: A Quiz Deck on the Science of Time and the History of Keeping it by Don Root
With 48 fact-filled cards per package, Knowledge Cards are a great source of condensed informationall in a deck the size of a pack of playing cards. Size: 3 x 4 in. By Don Root.
Buy How Long is a Second?: A Quiz Deck on the Science of Time and the History of Keeping it by Don Root from Australia's Online Independent Bookstore, BooksDirect.
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