File:Sommerfeld 1937 (USA 1952).jpg
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![File:Sommerfeld 1937 (USA 1952).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/f/f7/Sommerfeld_1937_%28USA_1952%29.jpg/790px-Sommerfeld_1937_%28USA_1952%29.jpg?20230116225018)
Size of this preview: 790 × 600 pixels. Other resolutions: 316 × 240 pixels | 633 × 480 pixels | 1,012 × 768 pixels | 1,280 × 972 pixels | 1,581 × 1,200 pixels.
Original file (1,581 × 1,200 pixels, file size: 404 KB, MIME type: image/jpeg)