From sundials to atomic clocks : understanding time and frequency /

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Bibliographic Details
Main Authors: Jespersen, James, Fitz-Randolph, Jane (Author)
Other Authors: Robb, John
Format: Book
Language:English
Published: [Washington] : [National Bureau of Standards, U.S. Department of Commerce] : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977.
Series:NBS monograph ; 155.
Subjects: