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Books and publications in Astronomy.

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Annales de l'Observatoire impérial de Paris

Author: Observatoire de Paris • Source: play.google.com • Pages: 762 • PDF
Observatory Circulars

Author: Johannesburg (South Africa). Union Observatory • Year: 1929 • Source: books.google.de • Pages: 560 •
Circulars

Author: Republic Observatory • Year: 1929 • Source: books.google.de • Pages: 570 •