Não informado. (1928). Instruments: The magazine of measurement and control. Instruments Publishing.
Citace podle Chicago (17th ed.)Não informado. Instruments: The Magazine of Measurement and Control. Pontiac, Ill: Instruments Publishing, 1928.
Citace podle MLA (8th ed.)Não informado. Instruments: The Magazine of Measurement and Control. Instruments Publishing, 1928.
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