Não informado. (2021). Engineering Index Monthly and Author Index. Engineering Index.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Engineering Index Monthly and Author Index. New York: Engineering Index, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Engineering Index Monthly and Author Index. Engineering Index, 2021.
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