Não informado. Agricultural reviews and manuals. Agricultural Research Service.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Agricultural Reviews and Manuals. New Orleans, La: Agricultural Research Service.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Agricultural Reviews and Manuals. Agricultural Research Service.
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