לוח שנה, רפורמה

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Proposals concerning calendar reform (sec. 4).

Isaac Newton 1642-1727

Proposals concerning calendar reform (sec. 6).

Isaac Newton 1642-1727

Proposals concerning calendar reform (sec. 3).

Isaac Newton 1642-1727

Proposals concerning calendar reform (sec. 5).

Isaac Newton 1642-1727

Proposals concerning calendar reform (sec. 1).

Isaac Newton 1642-1727

Proposals concerning calendar reform (sec. 7).

Isaac Newton 1642-1727

Proposals concerning calendar reform (sec. 2).

Isaac Newton 1642-1727

תעודות אישיות ושטרות.