소리의時代
Subtitle: ilsŏn kija ka ssŭn chŭngŏn ŭi pʻapʻyŏn
By: Cho Kyu-sŏk chŏ
Publisher: Taejong Chʻulpʻansa
Published: 1975
Place of publication: Sŏul Tʻŭkpyŏlsi
Language: kor
Number of pages: 327
Subjects: Civilization
Other titles: Sori ŭi sidae
Notes: In Korean.