Jaspersen, J. (1977). From sundials to atomic clocks: Understanding time and frequency. National Bureau of Standards.
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Chicago Style (17th ed.) Citation
Jaspersen, James. From Sundials to Atomic Clocks: Understanding Time and Frequency. Washington: National Bureau of Standards, 1977.
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MLA (9th ed.) Citation
Jaspersen, James. From Sundials to Atomic Clocks: Understanding Time and Frequency. National Bureau of Standards, 1977.
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Warning: These citations may not always be 100% accurate.