经常下载主要类别阅读书单中文电子书 AI阅读

经常下载主要类别

Books about Calendar -- Early works to 1800 (sorted by popularity)

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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 Earl of George Parker Macclesfield 162 downloads
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