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      • Often dates will be preceded with a “c.” or a “ca.”. These are abbreviations of the Latin word “circa” which means around, or approximately. We use this before a date to indicate that we do not know exactly when something happened, so c. 400 B.C.E. means approximately 400 years Before the Common Era.
      www.mvorganizing.org/what-does-c-stand-for-in-dates/
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