Não informado. (1891). Electrical news and engineering. Southam Business Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Electrical News and Engineering. Toronto, Canada: Southam Business Publications, 1891.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Electrical News and Engineering. Southam Business Publications, 1891.
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