Igŏt i na ŭi kanjŭng iyo : 50-yŏngan sŏngyo hwaltong ŭi pal chachʻwi /

by Ko, Yŏng-gŭn, 1933-
Published 2002

Hanʾguk Kidokkyo nŭn muŏt ŭl hago innŭnʾga? /

by Ko, Yŏng-gŭn, 1933-
Published 1995

Hanʾguk kyohoe ŭi naagal kil : Ko Yŏng-gŭn kʻallŏm /

by Ko, Yŏng-gŭn, 1933-
Published 2003

Chŏlgiyong sŏlgyo charyojip /

by Ko, Yŏng-gŭn, 1933-, Ko, Yŏng-gŭn, 1933-, Ko, Yŏng-gŭn, 1933-
Published 1994

Saeroun mokhoe kyehoek /

by Ko, Yŏng-gŭn, 1933-, Ko, Yŏng-gŭn, 1933-
Published 1997

Hanʼguk Kidokkyo nŭn muŏt ŭl hago innŭnʼga? /

by Ko, Yŏng-gŭn, 1933-
Published 1995

Hanʼguk kyohoe kaengsin kwa sonʼgyojŏk kwaje : Chonggyo kaehyŏk 53 chomok /

by Ko, Yŏng-gŭn, 1933-, Ko, Yŏng-gŭn, 1933-
Published 1994

Hanʼguk Kidokkyo nŭn ŏdiro kago innŭnʼga? /

by Ko, Yŏng-gŭn, 1933-, Ko, Yŏng-gŭn, 1933-, Ko, Yŏng-gŭn, 1933-, Ko, Yŏng-gŭn, 1933-
Published 1997

Kuwŏn hasin ŭnhye e podap haryŏgo : sŏnʾgyo hwaltong 40-yŏn ŭi palchachʻwi /

by Ko, Yŏng-gŭn, 1933-
Published 1993

Hanʾguk kyohoe ŭi naagal kil : Ko Yŏng-gŭn kʻallŏm /

by Ko, Yŏng-gŭn, 1933-, Ko, Yŏng-gŭn, 1933-
Published 2003