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N.N. Semenov

  • Colnect-2024-508-Chemical-chain-reactions-theory-NSemionov-1934.jpg
Short desc: N.N. Semenov


Things in this design:
scientist N.N. Semenov (syn. of Nikolay Semyonov)

This design is used by one stamp:
Russia 6/20/2000 1.75r dt=Russia 20th Century Science perf=12.25x12






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