(1937). The low voltage cathode ray tube and its applications / by G. Parr.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रThe Low Voltage Cathode Ray Tube and Its Applications / by G. Parr. 1937.
एमएलए (9वां संस्करण) प्रशस्ति पत्रThe Low Voltage Cathode Ray Tube and Its Applications / by G. Parr. 1937.
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