烏Chronology

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58060073085090010001100123015401600176018001900 670–729740–849910–9991010–10991160–12291290–15391700–1759

1

1

1

2

1

1

1

1

2

2

10 +4

1

1

1

2

1

14 +8

3

12 +6

2

10 +4

4

1

2

2

8 +2

2

1

1

6

7 +1

2

1

No year recorded 56

+50

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 ↗