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Keywords
- Almanacs1
- Astrology2
- Astronomy2
- Astronomy, Ancient1
- Astronomy, Arab1
- Calendars1
- Charts, diagrams, etc.1
- Early works5
- England1
- Fifteenth century[remove]5
- Islamic calendar1
- Jewish astronomy1
- Manuscripts, Arabic1
- Manuscripts, German1
- Manuscripts, Hebrew2
- Manuscripts, Latin2
- Manuscripts, Medieval1
- Manuscripts, Persian1
- Manuscripts, Renaissance2
- Mathematics1