| Unidentified photographer [A hand, taken during an expedition to China] 1902-1914 Photograph Museum für Asiatische Kunst: Staatlichen Museen zu Berlin Preußischer Kulturbesitz, Ident. Nr: B 1623, Attribution-NonCommercial-ShareAlike 3.0 Germany (CC BY-NC-SA 3.0 DE) LL/31355
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