The determination of precise time
By: by Sir Harold Spencer Jones
Publisher: U.S. G.P.O.
Published: 1950
Place of publication: Washington
Language: eng
Number of pages: 202
Subjects: Time measurements
Notes: "From the Smithsonian report for 1949, pages 189-202."

"Publication 4000."

"Sixteenth Arthur lecture, given under the auspices of the Smithsonian Institution, April 14, 1949."