Measurement of time and tests of timepieces.

Bibliographic Details
Corporate Author:	United States. National Bureau of Standards
Format:	Government Document Book
Language:	English
Published:	Washington : Govt. Print. Off, 1914.
Edition:	<1st ed.> Issued December 1, 1914.
Series:	Circular of the Bureau of Standards, no. 51
Subjects:	Clocks and watches. Time > Systems and standards.

Evans: US Documents (Annex 5th floor)