철도경찰 통계연보 2020
By: .
Publisher: Ch'ŏlto T'ŭkpyŏl Sabŏp Kyŏngch'aldae
Published: 2021
Place of publication: Taejŏn
Language: kor
Other titles: Ch'ŏlto kyŏngch'al t'onggye yŏnbo 2020