International Tin Research and Development Council. Statistical year book. s.n.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रInternational Tin Research and Development Council. Statistical Year Book. [The Hague]: s.n.
एमएलए (9वां संस्करण) प्रशस्ति पत्रInternational Tin Research and Development Council. Statistical Year Book. s.n.
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