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current | 18:02, 26 October 2009 | 1,077 × 1,560, 3 pages (306 KB) | Paulis | ((Information |Description=Unsichtbare, photographisch wirksame Strahlen. In: Photographische Rundschau 28 (Okt. 1900) S. 189-191 |Source=((GBS|XcwEAAAAYAAJ|US)) |Date=1900 |Author=Otto Walkhoff |Perm |
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