File:Karl Warburg SPA4.jpg
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![File:Karl Warburg SPA4.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Karl_Warburg_SPA4.jpg/348px-Karl_Warburg_SPA4.jpg?20211019110252)
Size of this preview: 348 × 599 pixels. Other resolutions: 139 × 240 pixels | 444 × 764 pixels.
Original file (444 × 764 pixels, file size: 371 KB, MIME type: image/jpeg)