禹Chronology

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6108309001000111015401660 620–829840–899910–9991010–11091200–15391600–1659

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No year recorded 10

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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 ↗