Não informado. (1898). Bulletin of the Astronomical Observatory of Harvard University. Astronomical Observatory of Harvard University.
Chicago-viite (17. p.)Não informado. Bulletin of the Astronomical Observatory of Harvard University. Cambridge, Mass: Astronomical Observatory of Harvard University, 1898.
MLA-viite (8. p.)Não informado. Bulletin of the Astronomical Observatory of Harvard University. Astronomical Observatory of Harvard University, 1898.
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