1 matching record(s)
file W (Stack)Essen, L.
"The Atomic Clock: A New Instrument for the Accurate Measurement of Time"
photocopy from Newnes Practical Mechanics, June 1949, pp. 276-278 and front cover.
[1991-8]
1949
1 matching record(s)
file W (Stack)Essen, L.
"The Atomic Clock: A New Instrument for the Accurate Measurement of Time"
photocopy from Newnes Practical Mechanics, June 1949, pp. 276-278 and front cover.
[1991-8]
1949