File:The joint problem, 1940.jpg
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Size of this preview: 480 × 600 pixels. Other resolutions: 192 × 240 pixels | 384 × 480 pixels | 614 × 768 pixels | 819 × 1,024 pixels | 1,652 × 2,065 pixels.
Original file (1,652 × 2,065 pixels, file size: 611 KB, MIME type: image/jpeg)