Não informado. (1907). Philippine Journal of Science. National Science Development Board.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Philippine Journal of Science. Manila: National Science Development Board, 1907.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Philippine Journal of Science. National Science Development Board, 1907.
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