[200 years since the birth of Josef Ryba (21 March 1795--1 March 1856)].
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D018153:Czech Republic; D049672:History, 19th Century; D006801:Humans; D009885:Ophthalmology / Q000266:history
Dvĕstĕ let od narození Josefa Ryby (21.3.1795-1.3.1856).