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Tong-uk Yu

  • Chŏkchŏng hayŏk nŭngnyŏk e ŭihan k'ŏnt'einŏ pudu kaebal pangsik ŭi kaesŏn pangan yŏn'guChŏkchŏng hayŏk nŭngnyŏk e ŭihan k'ŏnt'einŏ pudu kaebal pangsik ŭi kaesŏn pangan yŏn'gu