From sundials to atomic clocks : understanding time and frequency /
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| Main Author: | |
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| Corporate Authors: | , |
| Other Authors: | , |
| Format: | Government Document Book |
| Language: | English |
| Published: |
[Washington] :
Dept. of Commerce, National Bureau of Standards : for sale by the Supt. of Docs. U.S. Govt. Print. Off.,
1977 [published 1978]
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| Series: | NBS monograph ;
155. |
| Subjects: |