Haksul yŏnʻgu chosŏngbi e ŭihan yŏnʻgu pogosŏ

• Haksul yŏnʻgu chosŏngbi e ŭihan yŏnʻgu pogosŏ 1969
• Haksul yŏnʻgu chosŏngbi e ŭihan yŏnʻgu pogosŏ saein 1969
• Haksul yŏnʻgu chosŏngbi e ŭihan yŏnʻgu pogosŏ saein 1970
• Haksul yŏnʼgu chosŏngbi e ŭihan yŏnʼgu pogosŏ 1970