| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Yeonhaengrok research series 1 | 978-89-6071-001-6 (89-6071-001-6) | 2006 |
| Yeonhaengrok research series set | 978-89-6071-000-9 (89-6071-000-8) | 2006 |
C. K. · C. Keisch · C. Keyes · C. Koch · C. Koughia · Ch Koch · Chie Kose