File:PSM V71 D291 Bust of hermann helmholtz at the age of seventy in 1891.png
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Size of this preview: 439 × 599 pixels. Other resolutions: 176 × 240 pixels | 352 × 480 pixels | 563 × 768 pixels | 751 × 1,024 pixels | 1,546 × 2,109 pixels.
Original file (1,546 × 2,109 pixels, file size: 1.07 MB, MIME type: image/png)