Não informado. (1967). Farm Building News. American Farm Building Services.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Farm Building News. Iola, Wis: American Farm Building Services, 1967.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Farm Building News. American Farm Building Services, 1967.
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