Efim Bogoljubow
![Bogoljubow in 1925](https://upload.wikimedia.org/wikipedia/commons/7/78/Bogoljubow_1925.jpg)
}} (April 14, 1889 – June 18, 1952), was a Russian-born German chess grandmaster. Provided by Wikipedia
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Published: [2020]
Superior document: Title is part of eBook package: De Gruyter DGBA Mathematics - <1990
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