Não informado. (1975). Abstracts on tropical agriculture. Royal Tropical Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Abstracts on Tropical Agriculture. Amsterdam: Royal Tropical Institute, 1975.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Abstracts on Tropical Agriculture. Royal Tropical Institute, 1975.
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