三海國家公園
參考資料
- https://rsis.ramsar.org/ris/1938 （页面存档备份，存于）
- https://web.archive.org/web/20091202014146/
- http://www.backan.gov.vn/ （页面存档备份，存于） Bắc Kạn province official site
- https://web.archive.org/web/20161101052545/
- http://www.vietnamnationalparks.com/ （页面存档备份，存于） Vietnam National Parks
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