Data and circuits of radio receiver and amplifier valves.
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- OCLC Number: 243884992
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- Publication history: 1933/39-
Print Holdings
| Archiving Institution | Program | Holdings Description | Retention |
|---|---|---|---|
| HathiTrust (HATHI) | HTDL | v.2 1940; v.3 1949; v.3a 1952 | permanent |