Suche einschränken:
Zur Kasse

279 Ergebnisse - Zeige 261 von 279.

The Texas Mathematics Teachers' Bulletin, Vol. 16

Texas, University of
The Texas Mathematics Teachers' Bulletin, Vol. 16
Excerpt from The Texas Mathematics Teachers' Bulletin, Vol. 16: Number 2 In recent years there has been much discussion Of re forming the division Of the year into months and weeks. Our present system Of months is inherited from the Romans. When Julius Caesar made his reform in 46 b.c. He seems to have divided the year into 12 months Of 30 or 31 days each, except February, which had 29 days in ordinary years and 30 in leap years. At this peri...

CHF 13.50