Não informado. (1903). Science abstracts. Institution of Electrical Engineers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Science Abstracts. London: Institution of Electrical Engineers, 1903.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Science Abstracts. Institution of Electrical Engineers, 1903.
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