正易時代
Subtitle: palga onŭn huchʻŏn segye
By: Pak Sang-hwa chŏ
Edition: Chʻopʻan.
Publisher: Usŏng Munhwasa
Published: 1987
Place of publication: Sŏul Tʻŭkpyŏlsi
Language: kor
Number of pages: 390
Subjects: Divination; I Ching
Other titles: Chŏngyŏk sidae
Notes: Cover title.