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Clocks, from Shadow to Atom
Kathryn Kilby BorlandHelen Ross Speicher
出版Follett Publishing Company, 1969
主題Juvenile Nonfiction / Concepts / Date & Time
ISBN069581432X9780695814328
URLhttp://books.google.com.hk/books?id=EWXhAAAAMAAJ&hl=&source=gbs_api
註釋Describes the machines that man invented to record time from shadow and water clocks to quartz crystal and atomic clocks.