Korea through the ages /
Lee, Gil-sang.
Association of Korean History Teachers.
Han'gukhak Chungang Yŏn'guwŏn.Han'guk Munhwa Kyoryu Sent'ŏ.
Seongnam-si : Center for Information on Korean Culture, the Academy of Korean Studies,
2005.
Lee Gil-sang, editor.
v. 1. Ancient -- v. 2. Modern.