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Topical Subject: Soviet Union
删除限定条件 学科: Topical Subject: Soviet Union
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Витебская область (Vitebsk oblast) and Белорусская ССР (Byelorussian Soviet Socialist Republic)
删除限定条件 State/Province: Витебская область (Vitebsk oblast) and Белорусская ССР (Byelorussian Soviet Socialist Republic)