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Google圖書搜尋
From Sundials to Atomic Clocks
James Jespersen
Jane Fitz-Randolph
其他書名
Understanding Time and Frequency
出版
National Bureau of Standards, U.S. Department of Commerce
, 1959
URL
http://books.google.com.hk/books?id=sQ1fq8JlI38C&hl=&source=gbs_api