惟Chronology

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460500580600700800900100011001200141015901600170017901800 510–579750–799910–9991010–10991290–14091420–15891730–1789

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1

1

6

1

3

1

1

1

1

3

1

2

1

1

1

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1

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3

1

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1

1

1

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3

1

1

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1

4

No year recorded 81

+75

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 ↗