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ספרים בחינם

Remarks upon the solar and the lunar years, the cycle of 19 years, commonly called the golden number, the epact, and a method of finding the time of Easter, as it is now observed in most parts of Europe

George Parker, Earl of Macclesfield · 2020

ספרייה ציבורית, Project Gutenberg. בלי הרשמה.

Easter -- Early works to 1800Calendar -- Early works to 1800Calendar reform -- Early works to 1800