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  1.  6
    Sadan ch'ilchŏng chasehi ilki: sŏnhan chŏnggam ŭn ŏdi esŏ onŭn'ga.Sang-ho Yi - 2011 - Kyŏnggi-do P'aju-si: Kŭl Hangari.
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  2.  3
    Tonghak: T'oegyehak kwa Sirhak ŭl kyesŭng han ch'ŏngsonyŏn insŏng kyoyuksŏ.Sang-ho Yi - 2011 - Sŏul T'ŭkpyŏlsi: Edit'ŏ. Edited by Kwi-hyŏn Sin.
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  3. Yangmyŏng up'a wa Chŏng Che-du ŭi Yangmyŏnghak.Sang-ho Yi - 2008 - Sŏul-si: Hyean.
     
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