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Mapping time : the calendar and its history / E.G. Richards. Richards, E. G. (Edward Graham), author.
Oxford ; New York; Tokyo : Oxford University Press, 1998.
xxi, 438 pages : illustrations ; 24 cm
With background history on astronomy and the history of writing and counting as well as methods for converting dates in one calendar to another, this volume provides a useful overview of how calendars were invented and their subsequent development.