Não informado. (1964). Commodity yearbook statistical abstract service. Commodity Research Bureau.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Commodity Yearbook Statistical Abstract Service. New York: Commodity Research Bureau, 1964.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Commodity Yearbook Statistical Abstract Service. Commodity Research Bureau, 1964.
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