Não informado. (2000). University of California publications in botany. University of California.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. University of California Publications in Botany. Berkeley, Calif: University of California, 2000.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. University of California Publications in Botany. University of California, 2000.
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