Não informado. (1877). Studies from the Biological Laboratory. Johns Hopkins University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Studies from the Biological Laboratory. Baltimore, Md: Johns Hopkins University, 1877.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Studies from the Biological Laboratory. Johns Hopkins University, 1877.
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