Tham khảo Chonma

  1. ↑ According to the Dusan and Korean Britannica online encyclopedias.
  • International Information Research Institute (국제정보연구소) (1999). “천마군”. 北韓情報總覽 2000 [Bukhan jeongbo chong-ram 2000]. Seoul: Author. tr. 826–827.

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