Kyu-tʻae Yi

title	ISBN-13 (ISBN-10)	year of publication
Pŏrigo sipʻŭn pŏrŭt	978-89-359-0009-1 (89-359-0009-5)	1991
Salligo sipʻŭn pŏrŭt	978-89-359-0010-7 (89-359-0010-9)	1991