眷Chronology

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5005806007008009001110120014101540166017701800 520–579810–899910–11091230–14091420–15391600–16591690–1769

1

1

1

1

1

1

1

1

1

1

1

1

4

1

1

1

3

1

1

1

2

2

1

1

1

1

1

1

1

1

No year recorded 4

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 ↗