|Nikolay Beketov Russian physical chemist and metallurgist. Illustrated Envelop with special cancellation|
|Description||Nikolay Nikolayevich Beketov (January 13, 1827 – St. Petersburg, December 13, 1911) was a Russian physical chemist and metallurgist|
|Type||Illustrated Envelop special cancellation “150th Birthday Anniversary”|
|Published by/for:||Ministry of Communications, 1976|
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