File:Jakob Volhard.jpg
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![File:Jakob Volhard.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/6/66/Jakob_Volhard.jpg/428px-Jakob_Volhard.jpg?20240422155756)
Size of this preview: 428 × 599 pixels. Other resolutions: 171 × 240 pixels | 343 × 480 pixels | 750 × 1,050 pixels.
Original file (750 × 1,050 pixels, file size: 204 KB, MIME type: image/jpeg)