電Chronology

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5005806007008009601120172018201900 510–579720–799840–959970–11191160–17191730–1819

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6

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No year recorded 23

+17

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 ↗