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  1. Hanʼguk ŭi sirhak sasang.Hyŏng-wŏn Yu & Man-gil Kang (eds.) - 1981 - Sŏul Tʻŭkpyŏlsi: Samsŏng Chʻulpʻansa.
     
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  2. Hanʼguk ŭi sirhak sasang.Hyŏng-wŏn Yu, Ik Yi, Man-gil Kang & Tong-Hwan Yi (eds.) - 1981 - Sŏul Tʻŭkpyŏlsi: Samsŏng Chʻulpʻansa.
     
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  3. Panʼgye surok.Hyŏng-wŏn Yu - 1974 - Edited by Minsu[From Old Catalog] Yi & Man-sŏNg[From Old Catalog] Nam.
     
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