Colnect-2024-508-Chemical-chain-reactions-theory-NSemionov-1934.jpg
Source: Colnect
Issued by: Russia
Function: postage
Date: 6/20/2000
Denom: 1.75r
Color: multicolored
Design type: Russia 20th Century Science
Design: N.N. Semenov
Watermark: unwmk
Perf: 12.25x12
Catalog value:



External links:
Colnect 213487..v_1934-Science


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