(1900). Yearbook of the United States Department of Agriculture: научное издание.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रYearbook of the United States Department of Agriculture: научное издание. 1900.
एमएलए (9वां संस्करण) प्रशस्ति पत्रYearbook of the United States Department of Agriculture: научное издание. 1900.
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