Measurement of time and tests of timepieces
Edition: 1st ed.  Issued December 1, 1914
Series: Circular of the Bureau of Standards -- no. 51
Publisher: Govt. Print. Off.
Published: 1914
Place of publication: Washington
Language: eng
Number of pages: 39
Subjects: Clocks and watches; Time -- Systems and standards
Notes: S. W. Stratton, director

At head of title: Department of Commerce