From sundials to atomic clocks
Subtitle: understanding time and frequency
By: by James Jespersen and Jane Fitz-Randolph ; illustrated by John Robb
Contributors: Fitz-Randolph, Jane, author; Robb, John; United States. National Bureau of Standards; United States. Air Force Communications System
Series: NBS monograph -- 155
Publisher: Department of Commerce, National Bureau of Standards : for sale by the Supt. of Docs. U.S. Govt. Print. Off.
Published: 1977
Place of publication: Washington]
Language: eng
Subjects: National Measurement System for Time and Frequency; Time; Systems and standards
Notes: Preparation of document was supported in part by the 1842nd Electronic Engineering Group, C2/DCS Division, Air Force Communications Service.

December 1977.

Bibliography : p. 170.