祖Chronology

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58060067070081090010001100120015401600170018001900 620–669750–809840–899910–9991010–10991290–1539

2

1

1

1

1

1

2

1

2

2

2

1

1

1

10 +4

1

1

1

1

1

1

2

12 +6

13 +7

1

8 +2

7 +1

4

4

6

1

1

6

3

1

No year recorded 111

+105

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 ↗