Não informado. (1970). Advances in materials technology monitor. United Nations, Industrial Development Organization.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Advances in Materials Technology Monitor. Vienna: United Nations, Industrial Development Organization, 1970.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Advances in Materials Technology Monitor. United Nations, Industrial Development Organization, 1970.
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