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Image Colnect-2095-663-Goldbackh-conjecture.jpg

Colnect-2095-663-Goldbackh-conjecture.jpg
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Type: stamp Issuer: China, PRC Date: 1999 Denom: ?
Visibility: public Image owner: none

postage 11/1/1999 80f multi issue=50th Anniversary of Chinese Academy of Sciences unwmk perf=12

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Source name: Colnect
File URL: http://i.colnect.net/images/b/2095/663/Goldbackh-conjecture.jpg

Uploaded July 23, 2014, 4:51 pm by Stan Shebs