Riehle, F. (2004). Frequency standard: Basic and applications. Weinheim: Wiley-VCH.
Trích dẫn kiểu ChicagoRiehle, Fritz. Frequency Standard: Basic and Applications. Weinheim: Wiley-VCH, 2004.
Deismireacht MLARiehle, Fritz. Frequency Standard: Basic and Applications. Weinheim: Wiley-VCH, 2004.
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