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.; National Bureau of Standards.
Series: National Bureau of Standards monograph; 155
Publisher: U.S. Government Printing Office
Published: 1977
Place of publication: Washington, D.C
Language: eng
Number of pages: 175