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Type: stamp Issuer: Russia Date: 1951 Denom: ? Visibility: public Image owner: none postage 12/10/1951 40k multi issue=Ostrogradsky 150th d=M. V. Ostrogradsky unwmk perf=12 Crops No visible images cropped from this one. Measurements Resolution is unknown. Source Source name: Colnect File URL: http://i.colnect.net/b/193/048/Mikhail-V-Ostrogradsky-1801-1862-Ukrainian-mathematician.jpg Uploaded August 22, 2014, 4:26 pm by Stan Shebs