Não informado. (2000). Experiment station record. U.S. Department of Agriculture.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Experiment Station Record. Washington: U.S. Department of Agriculture, 2000.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Experiment Station Record. U.S. Department of Agriculture, 2000.
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