Parrett, O. S. (1939). Diseases of food animals. Southern Publishing Ass.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रParrett, Owen S. Diseases of Food Animals. Southern Publishing Ass, 1939.
एमएलए (9वां संस्करण) प्रशस्ति पत्रParrett, Owen S. Diseases of Food Animals. Southern Publishing Ass, 1939.
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