Thema Subject Categories 1.2

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Notation Category heading ?
3 Time period qualifiers
Do not use “3” on individual books, but select qualifiers from section 3* as appropriate
3B Prehistory
3B* codes may be used for different time periods depending on the geographical area
3C BCE period – Protohistory
3K CE period up to c 1500
3M c 1500 onwards to present day