Não informado. (2000). Transactions of the Astronomical Observatory of Yale University. Yale University, Astronomical Observatory.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Transactions of the Astronomical Observatory of Yale University. New Haven, Conn: Yale University, Astronomical Observatory, 2000.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Transactions of the Astronomical Observatory of Yale University. Yale University, Astronomical Observatory, 2000.
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