察Chronology

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510580600670700800900100010801100120015401600170018001900 520–579620–669910–9991010–10791290–1539

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4

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6

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2

No year recorded 108

+102

Each crop stands at the decade of the first year its book's date gives; a date given only as before a year stands at that year. Dates come from the catalogues and editions cited with each record. The bars draw the whole span and their counts to scale; in the strip below them, fifty years or more with no crop are folded and marked. Japanese dates converted with HuTime ↗