Não informado. (1948). Highway Engineer. Institution of Highway Engineers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Highway Engineer. London: Institution of Highway Engineers, 1948.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Highway Engineer. Institution of Highway Engineers, 1948.
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