Não informado. (1891). Electrical news and engineering. Southam Business Publications.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Electrical News and Engineering. Toronto, Canada: Southam Business Publications, 1891.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Electrical News and Engineering. Southam Business Publications, 1891.
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