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https://klimbim2014.wordpress.com/2020/02/24/stalin-dec-1927-%D0%BD%D0%B0-xv-%D1%81%D1%8A%D0%B5%D0%B7%D0%B4%D0%B5-%D0%B2%D0%BA%D0%BF%D0%B1-%D0%BC%D0%BE%D1%81%D0%BA%D0%B2%D0%B0-1927-%D0%B3/