File:Gustav Robert Kirchhoff (HeidICON 33483).jpg
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![File:Gustav Robert Kirchhoff (HeidICON 33483).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/7/71/Gustav_Robert_Kirchhoff_%28HeidICON_33483%29.jpg/478px-Gustav_Robert_Kirchhoff_%28HeidICON_33483%29.jpg?20180801195823)
Size of this preview: 478 × 599 pixels. Other resolutions: 191 × 240 pixels | 383 × 480 pixels | 613 × 768 pixels | 817 × 1,024 pixels | 1,635 × 2,048 pixels | 3,054 × 3,826 pixels.
Original file (3,054 × 3,826 pixels, file size: 4 MB, MIME type: image/jpeg)