Roper, W. E. (2000). Managing technology in the iron and steel industry. Center for Integrative and Development Studies and the Technology Management Center.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRoper, William E. Managing Technology in the Iron and Steel Industry. University of the Philippines: Center for Integrative and Development Studies and the Technology Management Center, 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRoper, William E. Managing Technology in the Iron and Steel Industry. Center for Integrative and Development Studies and the Technology Management Center, 2000.
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