Colnect-2095-663-Goldbackh-conjecture.jpg
Source: Colnect
Issued by: China, PRC
Function: postage
Date: 11/1/1999
Issue: 50th Anniversary of Chinese Academy of Sciences
Denom: 80f
Color: multicolored
Design:
Watermark: unwmk
Perf: 12
Catalog value:


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External links:
Colnect 474443..oples_Republic