Não informado. (1957). IRE national convention record. Institute of Radio Engineers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. IRE National Convention Record. New York: Institute of Radio Engineers, 1957.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. IRE National Convention Record. Institute of Radio Engineers, 1957.
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