| Unidentified artist Josef Székely (1838–1901), Austrian-Hungarian chemist and photographer 1901, 18 October (earlier) Book illustration Creative Commons - Wikipedia LL/66158 Ludwig Schrank, November 1901, "Gedenkblatt zum 40jährigen Jubiläum der Photographischen Gesellschaft in Wien", Photographische Correspondenz, vol. 38, nr. 494, pp. 655–674, Portrait p. 657
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