Não informado. (2003). Concrete building and concret products. Cement and Concrete Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Concrete Building and Concret Products. London: Cement and Concrete Association, 2003.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Concrete Building and Concret Products. Cement and Concrete Association, 2003.
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