Title: Sahoe ŏnŏhak kwanchŏm esŏŭi Kugŏ hoch'ingŏ sachŏk chŏn'gae yangsang yŏn'gu
Subjects: Forms of Address, Honorific, Grammar, Korean language, Sociolinguistics, Middle Korean, Social aspects
Places: Korea (South)
Time periods: Middle Korean, 935-1500