Não informado. (1991). Proceedings of the National Science Council. National Science Council.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Proceedings of the National Science Council. Taipei: National Science Council, 1991.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Proceedings of the National Science Council. National Science Council, 1991.
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