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(2001) Sanhaegwan jamgin muneul han soneuro milchidoda?H\Eulbyeong yeonhaengnok (The Records of Travels to Beijing in 1765), Seoul: Dolbege

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(1997) ?HgJoseon hugiui seohak yuipgwa seogi suyongnon?Hh (The Influx of Western Learning and the Theory of Accepting Modern Instruments of Civilization of the West in the Late Joseon Period), Seoul: Jindan Hakhoe

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