Park, Francis Y. T., author
Hollym International , 1984
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The National Institute of the Korean Language & The International Korean Language Foundation, 2008
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Seung, Eun-oh, author
Darakwon, 2006
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Jo, Su-jin, author
Sotong, 2010
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Kim, Jong-sob, author
Kyeonghwedehakkyo, 2007
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