Chosŏn kodaesa yŏn'gu
Study of Ancient Korean History
v.1 Kuryŏsa yŏn'gu, kodae sigi Chosŏn minjok ŭi hyŏngsŏng e taehan yŏksajŏk koch'al
Study of Kuryŏ History, Historical Study on Formation of Korean Nation in Ancient Period

Chosŏn kodaesa yŏn'gu
Study of Ancient Korean History
v.2 Tan'gun e taehan uri sŏnjodŭl ŭi ihae wa sungbae, Ilche ŭi Tan'gun malsal ch'aektong kwa kŭ rŭl pandaehan uri inmindŭl ŭi t'ujaeng
Our Ancestors' Understanding and Worship on Tan'gun, Japanese Imperialism's Scheme to Annihilate Tan'gun and the Struggle of Our People Who Oppose the Scheme

Chosŏn kodaesa yŏn'gu
Study of Ancient Korean History
v.3 Ko Chosŏn ŭi chŏngch'i chedo, "Samgukchi" Hanjŏn e taehan yŏn'gu
The Political System of KoChosŏn, Study on "Samgukchi" (Three Kingdoms)