Testing of timepieces
By: by R. E. Gould. <Issued August 14, 1941>
Series: U.S. National bureau of standards. Circular of the National bureau of standards C432
Publisher: U.S. Govt. print. off.
Published: 1941
Place of publication: Washington
Language: eng
Number of pages: 27
Subjects: Clocks and watches.
Notes: At head of title: U.S. Dept. of commerce. Jesse H. Jones, secretary. National bureau of standards, Lyman J. Briggs, director...
"Supersedes Circular C392."