Não informado. (1953). Maine farm research. Maine Agricultural Experiment Station.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Maine Farm Research. Orono, Me: Maine Agricultural Experiment Station, 1953.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Maine Farm Research. Maine Agricultural Experiment Station, 1953.
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