Image: Euler-USSR-1957-stamp
Size of this preview: 800 × 576 pixels. Other resolutions: 320 × 230 pixels | 2,009 × 1,447 pixels.
Original image (2,009 × 1,447 pixels, file size: 1.35 MB, MIME type: image/jpeg)
Title: Euler-USSR-1957-stamp
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
Image usage
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