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| Keywords: Orest Danilovich Khvolson.gif en was a Russian physicist and honorary member of the Soviet Academy of Sciences 1920 He is most noted for being one of the first to study the gravitational lens effect 1 ru 1876 год - О Д Хвольсон - молодой п иват-доцент С - Пете бу гского униве ситета http //rybkin h16 ru/uchastniki htm hvols Author 1876 PD-old Category Orest Khvolson | ||||
