礙Chronology

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5106106707008009009701000108011001200154016601940 520–609620–669820–899910–9691010–10791150–11991230–15391550–16591670–1939

2

8 +2

2

2

1

2

3

1

1

1

4

1

2

1

1

1

3

1

2

4

2

2

1

2

1

No year recorded 5

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 ↗