Não informado. (1888). Bulletin of the North Carolina Agricultural Experiment Station. North Carolina State University of Raleigh.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the North Carolina Agricultural Experiment Station. Raleigh, NC: North Carolina State University of Raleigh, 1888.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the North Carolina Agricultural Experiment Station. North Carolina State University of Raleigh, 1888.
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