Title: Sŏngho haktʻong yŏnʾgu
Subjects: Philosophy, Philosophy, Korean, History, Korean Philosophy
Places: Korea
People: Chŏng-bok An (1712-1791), Tŏk-kil Hwang (1750-1827), Ik Yi (1681-1763), Chŏn Hŏ (1797-1886)