俄Chronology

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61011101230159016001700178018001900 620–11091160–12291290–15891730–1779

1

1

1

1

2

1

1

3

1

10 +4

2

1

32 +26

5

2

2

4

7 +1

2

1

1

2

2

2

2

2

1

No year recorded 43

+37

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 ↗