File:2001. Stamp of Belarus 0427.jpg
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2001._Stamp_of_Belarus_0427.jpg (368 × 350 pixels, file size: 24 KB, MIME type: image/jpeg)
Categories:
- Stamps of Belarus, 2001
- Mathematicians on stamps
- Otto Schmidt
- People of Belarus on stamps
- Heroes of the Soviet Union on stamps
- Scientists from the Soviet Union on stamps
- Scientists from Russia on stamps of Belarus
- Astronomers on stamps
- 110th anniversaries on stamps
- People on stamps of Belarus
- Maps of events on stamps
- Maps of research on stamps