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Direct-reading frequency meter
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[2]
Characteristics and functions of thyratrons
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PHYSICS-A JOURNAL OF GENERAL AND APPLIED PHYSICS,
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[4]
A thermionic type frequency meter for use up to 15 kc
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PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS,
1931, 19 (08)
:1384-1390
[5]
SEASHORE CE, 1930, J ACOUST SOC AM, V2, P77