Não informado. (2019). The Engineering index Annual. American Society of Mechanical Engineers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. The Engineering Index Annual. New York: American Society of Mechanical Engineers, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. The Engineering Index Annual. American Society of Mechanical Engineers, 2019.
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