看Chronology

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50073090011101230141015401600174018001900 510–729750–899910–11091160–12291290–14091420–15391690–1739

1

4

1

1

1

2

1

1

1

1

1

1

1

1

2

2

1

5

4

3

11 +5

2

2

6

2

5

1

1

No year recorded 36

+30

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 ↗