Title: "Yongbi ŏch'ŏn'ga" ŭi kugŏhakchŏk punsŏk kwa hyŏndaeyŏk
Subjects: Korean language, Korean Epic literature, Yongbi ŏch'ŏn'ga, Yongbi ŏchʻŏnʼga
Time periods: Middle Korean, 935-1500