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Delegates of the 24th CPSU Congress (from left): Viktor Ambartsumyan, chairman of the Academy of Sciences of the Armenian SSR, director of the Byurakan Observatory, with Nikolai Muskhelishvili, chairman of the Academy of Sciences of the Georgian SSR, director of Razmadze Mathematical Institute (Tbilisi) of the Georgian SSR Academy of Sciences. (KEYSTONE/SPUTNIK/Yuryi Abramochkin)