File:Leon Piotr Nencki.jpg
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![File:Leon Piotr Nencki.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/1/18/Leon_Piotr_Nencki.jpg/472px-Leon_Piotr_Nencki.jpg?20190801152728)
Size of this preview: 472 × 599 pixels. Other resolutions: 189 × 240 pixels | 378 × 480 pixels | 948 × 1,203 pixels.
Original file (948 × 1,203 pixels, file size: 277 KB, MIME type: image/jpeg)