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  1.  14
    Ch'ŏnmyŏng kwa Yugyojŏk in'ganhak.In-ch'ang Song - 2011 - Sŏul-si: Simsan.
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  2.  9
    Han'guk yugyo chisigin ŭi isang kwa silch'ŏn.In-ch'ang Song - 2012 - Sŏul-si: Simsan.
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  3.  14
    Song Chun-gil: hwahae wa p'oyong ŭi yehakcha.In-ch'ang Song - 2009 - Sŏul T'ŭkpyŏlsi: Sŏnggyun'gwan Taehakkyo Ch'ulp'anbu.