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500610670700800960111018001940 510–609620–669720–799840–959970–11091160–17991890–1939

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No year recorded 26

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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 ↗