File:Joseph Petzval Dr Ignaz Heger c1856-57.jpg
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Joseph_Petzval_Dr_Ignaz_Heger_c1856-57.jpg (424 × 566 pixels, file size: 84 KB, MIME type: image/jpeg)
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current | 11:31, 28 February 2013 | 424 × 566 (84 KB) | Dusan (talk | contribs) |
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