七十年代變秦曲
Subtitle: Yu Kyŏng-hwan esei
Publisher: Pʻyŏnghwa Chʻulpʻansa
Published: 1978
Place of publication: Sŏul
Language: kor
Number of pages: 343
Other titles: Chʻilsimnyŏndae pyŏnjugok; 70-yŏndae pyŏnjugok.