Não informado. (1895). Circular of the Astronomical Observatory of Harvard College. Harvard College, Astronomical Observatory.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Circular of the Astronomical Observatory of Harvard College. Cambridge, Mass: Harvard College, Astronomical Observatory, 1895.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Circular of the Astronomical Observatory of Harvard College. Harvard College, Astronomical Observatory, 1895.
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