Não informado. (1937). Cement and Lime Manufacture. Cement and Concrete Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Cement and Lime Manufacture. London: Cement and Concrete Association, 1937.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Cement and Lime Manufacture. Cement and Concrete Association, 1937.
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