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Directory Listings Astronomical Calendars Essay which defines what a year is and looks at the different celndar systems in use. http://www.maa.mhn.de/Scholar/calendar.html - profile Primer on the Evolution of Astronomical Calendars Essay by Bryan C. Bates which traces the development of astronomical calendars from ancient times to the present. http://www.cpluhna.nau.edu/Tools/archaeoastronomy.htm - profile |
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