Não informado. (1929). Water works and sewerage. Gillette Publishing Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Water Works and Sewerage. Chicago, Ill: Gillette Publishing Company, 1929.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Water Works and Sewerage. Gillette Publishing Company, 1929.
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