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The Soviet Union 1966 CPA 3309 stamp (2nd International Congress of Oceanography (30.05–9.06, Moscow). Emblem - Oceanographic Instrument and Globe. Oceanographic Instrument in the High Sea and Hydrographic Ship with Trawl).jpg - Matsievsky
The Soviet Union 1966 CPA 3309 stamp (2nd International Congress of Oceanography (30.05–9.06, Moscow). Emblem - Oceanographic Instrument and Globe. Oceanographic Instrument in the High Sea and Hydrographic Ship with Trawl).png - Matsievsky
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