Não informado. (1971). ADAS Quarterly Review. Agricultural Development and Advisory Service.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. ADAS Quarterly Review. London: Agricultural Development and Advisory Service, 1971.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. ADAS Quarterly Review. Agricultural Development and Advisory Service, 1971.
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