郷Chronology

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61074083090010001100120012801540160017701800 620–739750–829840–899910–9991010–10991230–12791290–15391700–1769

1

3

1

2

1

1

1

1

1

1

1

1

2

2

3

5

1

20 +14

6

13 +7

6

1

1

1

6

No year recorded 220

+214

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 ↗