File:Rudolf Hackelberg-Landau Litho.jpg
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![File:Rudolf Hackelberg-Landau Litho.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Rudolf_Hackelberg-Landau_Litho.jpg/399px-Rudolf_Hackelberg-Landau_Litho.jpg?20130502082508)
Size of this preview: 399 × 599 pixels. Other resolutions: 160 × 240 pixels | 320 × 480 pixels | 512 × 768 pixels | 1,199 × 1,799 pixels.
Original file (1,199 × 1,799 pixels, file size: 363 KB, MIME type: image/jpeg)