Kwagŏ, ch'ulse ŭi sadari chokpo rŭl t'onghae pon Chosŏn munkwa kŭpcheja ŭi sinbun idong = 1776-1863 - Han, Yeong u 1938- (Ihwa haksurwŏn chisŏngsa ch'ongsŏ, 2013)