Não informado. (1906). Engineering and contracting. Engineering and Contracting Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Engineering and Contracting. Chicago, Ill: Engineering and Contracting Publishing, 1906.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Engineering and Contracting. Engineering and Contracting Publishing, 1906.
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