Não informado. (1975). Minerals and Metals Review. Asian Industry and Information Services.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Minerals and Metals Review. Bombay, India: Asian Industry and Information Services, 1975.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Minerals and Metals Review. Asian Industry and Information Services, 1975.
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