Não informado. (1922). Engineering and Mining Journal-Press. McGraw-Hill Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Engineering and Mining Journal-Press. New York: McGraw-Hill Publications, 1922.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Engineering and Mining Journal-Press. McGraw-Hill Publications, 1922.
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