Não informado. Soil management abstracts. International Board for Soil Research and Management.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Soil Management Abstracts. Bangkok: International Board for Soil Research and Management.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Soil Management Abstracts. International Board for Soil Research and Management.
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