A satellite-controlled digital clock
J. V. Cateora · 1976
Bureauof Standards research and development in physics, mathematics, and chemistry.It is published in two sections, available separately: • Physics and Chemistry (Section A) Papers of interest primarily to scientists working in these fields.This section covers a broad range of physical and chemical research, with major emphasis on standards of physical measurement, fundamental con- stants, and properties of matter.Issued six times a year.Annual subscription: Domestic