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Keywords
- Alexander, the Great, 356 B.C.-323 B.C.1
- Almanacs2
- Almucantar1
- Annotations1
- Arabic alphabet1
- Astrolabes1
- Astrology2
- Astrology, Arab1
- Astronomical instruments1
- Astronomy9
- Astronomy, Arab1
- Astronomy--Tables3
- Austria--Lambach (Upper Austria)1
- Autographs1
- Calendar reform1
- Calendar, Gregorian1
- Calendars1
- Charts, diagrams, etc.1
- Ciphers1
- Comets1