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    Oughtopia.Yŏng-sik Cho - 1981 - New York: Pergamon Press.
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  2. Otʻopʻia: chŏnsŭnghwa iron ŭl kichʻo ro hayŏ.Yŏng-sik Cho - 1979 - Sŏul Tʻŭkpyŏlsi: Ŭryu Munhwasa.
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  3. Wu dao bi an: li xiang she hui di shi xian = Oughtopia.Yŏng-sik Cho - 1985 - Taibei Shi: Guo li bian yi guan Zhonghua cong shu bian shen wei yuan hui. Edited by Qiushan Lin.
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