Não informado. (1978). The Structural Engineer. Institution of Structural Engineers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. The Structural Engineer. London: Institution of Structural Engineers, 1978.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. The Structural Engineer. Institution of Structural Engineers, 1978.
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