Não informado. (1911). Journal of the Washington Academy of Science. Washington Academy of Sciences.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Washington Academy of Science. Washington: Washington Academy of Sciences, 1911.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Washington Academy of Science. Washington Academy of Sciences, 1911.
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