Não informado. (1956). Research for farmers. Department of Agriculture.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Research for Farmers. Ottawa: Department of Agriculture, 1956.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Research for Farmers. Department of Agriculture, 1956.
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