50度線,是南緯和北緯都有的一條緯線。在此介紹的是歷史上庫頁島(日本稱樺太)在被劃分南北、由日俄兩國分別統治時以此所畫的國界。
位置
國界標石
國界標石的所在地與現狀
國境紛爭
參見
註釋
外部連結
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