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"David Ewing Duncan's book takes the story from a 28,000-year-old Cro-Magnon lunar-calendar bone-carving to the beginning of Co-ordinated Universal Time, measured in oscillations of caesium since 1972. It is far and away the most thorough and the most readable yet to have been written on this dense, senseless subject.David Ewing Duncan is the author of 'Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year' with ISBN 9780756750121 and ISBN 0756750121.
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