The Great Soviet Encyclopedia was by its nature USSR only. I only ever saw Russian language version. Or if you ask about Chenghiz Khan, lots have been written

The Great Soviet Encyclopedia was by its nature USSR only. I only ever saw Russian language version. Or if you ask about Chenghiz Khan, lots have been written about him. I have "CHINGGIS KHAN: The Golden History of the Mongols" from Folio Society (https://www.amazon.com/CHINGGIS-KHAN-Golden-History-Mongols/dp/B000LJPPZK https://www.amazon.com/CHINGGIS-KHAN-Golden-History-Mongols/...), a book from roughly 7 centuries ago from his contemporaries. It reads like a mixture of poetry and really bloody fantasy. All of the geographic places are unrecognizable to modern reader. Great stuff.