Não informado. (2018). Reports from the Observatory of Lund. Lund Observatory.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Reports from the Observatory of Lund. Lund, Suecia: Lund Observatory, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Reports from the Observatory of Lund. Lund Observatory, 2018.
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