조선어연구
By: Yŏnbyŏn Sahoe Kwahagwŏn Ŏnŏ Yŏnʾguso pʻyŏn
Publisher: Hŭngnyonggang Chosŏn Minjok Chʻulpʻansa
Published: 1987
Place of publication: Moktangang
Language: kor
Subjects: Korean language
Other titles: Chosŏnŏ yŏnʾgu