Não informado. (2000). Technical bulletin. Institute for Land and Water Management Research.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Technical Bulletin. Wageningen, Holanda: Institute for Land and Water Management Research, 2000.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Technical Bulletin. Institute for Land and Water Management Research, 2000.
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