Yak i toenŭn, tok i toenŭn mul
Subtitle: mul kwa inchʻe saengni rŭl kwahakchŏk ŭro punsŏkhan algi swiun kajŏng kŏnʼgang chichʻim
By: [kamsu Hŏ Chŏng ; kŭl Nam Sang-ho ... et al.].
Contributors: Nam, Sang-ho.
Edition: 1-pʻan
Publisher: Chungang Ilbosa
Published: 1992
Place of publication: Sŏul
Language: kor
Number of pages: 159
Subjects: Drinking water -- Health aspects; Drinking water -- Contamination; Drinking water -- Purification
Other titles: Mul