Sŭng-gwŏn Yu

• So ŭi kŭnyuk kwa chibang kwallyŏn kyŏngje hyŏngjil yuyong yujŏnja ŭi kinŭng punsŏk ŭl wihan model sisŭt'em ŭi kaebal kwa sanŏpchŏk hwaryong pangan kuch'uk =