Yŏk samt'uap chŏngsugi ka saram chamnŭnda
By: chiŭni Son Sang-dae
Edition: 1-p'an
Publisher: Sŏyŏng
Published: 2012
Place of publication: Inch'ŏn Kwangyŏksi
Language: kor
Number of pages: 230
ISBN-13: 9788997180158
Subjects: Drinking water; Purification; Water quality
Notes: "Sansŏngsu konggŭp 20-yŏnyŏn, kungmin kŏn'gang chŏksinho kwahakchŏk kyumyŏng! 'mitko masin mul' i tangsin ŭi kŏn'gang ŭl manggattŭryŏtta!"