- International Correspondence Schools, Scranton, Pennsylvania: Vacuum-Tube Detectors, Home Study.
- 1955 booklet, by F. Malcolm Gager Senior Member Institute of Radio Engineers; Branch Head Naval Reseach Laboratory.
- Amplitude modulation
- Low-level detection of amplitude modulated signals
- High-level detection of amplitude Modulated signals
- Regenerative and heterodyne detection
- Frequency modulation and demodulation pages
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