Ongni, ssŏgŭn ni ppŏdŭrŏng ni
By: Yi Myŏng-suk chŏ.
Publisher: Yŏwŏn Munhwasa Chʻulpʻanguk
Published: 1979
Place of publication: Sŏul Tʻukpyŏlsi
Language: kor
Number of pages: 238
Subjects: Teeth -- Care and hygiene.