促Chronology

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8001110122018201900 810–11091160–12191230–1819

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1

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3

1

1

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6

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3

1

No year recorded 37

+31

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 ↗