救Chronology

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46050058060070080090010001100120014101590160017201800 520–579720–799840–899910–9991010–10991290–14091420–15891670–1719

1

1

1

1

1

5

2

3

1

2

1

1

2

1

2

1

1

1

1

1

2

1

2

2

1

2

1

2

1

1

1

3

1

1

1

No year recorded 30

+24

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 ↗