(1897). 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. 1897.
एमएलए (9वां संस्करण) प्रशस्ति पत्रYearbook of the United States Department of Agriculture: научное издание. 1897.
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