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Keywords
- Almanacs1
- Armenia1
- Astrology1
- Astronomy2
- Astronomy--Tables1
- Austria--Lambach (Upper Austria)1
- Calendar1
- Church year1
- Early works3
- Easter1
- Ephemerides1
- Fifteenth century1
- Finding tabs1
- History1
- Manuscripts, Armenian1
- Manuscripts, Latin2
- Manuscripts, Renaissance3
- Monastic libraries1
- Perpetual calendars1
- Sixteenth century1