垢Chronology

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46050061070080090011001200141015901600177018001900 520–609820–899910–10991290–14091420–15891690–1769

1

1

2

1

1

3

1

1

1

1

3

1

1

1

2

2

2

2

1

1

1

1

1

1

2

1

4

1

10 +4

14 +8

3

9 +3

2

1

No year recorded 8

+2

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 ↗