Não informado. (1924). Agricultural Progress. Agricultural Education Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Agricultural Progress. London: Agricultural Education Association, 1924.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Agricultural Progress. Agricultural Education Association, 1924.
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