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Name: Britannica.com - Clockworks: From Sundials to the Atomic Second

Description: Britannica.com explores the history of timekeeping, from sundials to cesium atomic clocks.

Category: Calendars and Timekeeping

Url: http://www.britannica.com/clockworks

Date: 20-08-2003

Current Rating: 6.00

  


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Rating: 6.00
Votes: 1350



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