Hwanʾgyŏng pojŏn
By: Pak Yŏng-gyu ...[et al.].
Contributors: Pak Yŏng-gyu.
Edition: Chʻopʻan
Publisher: Hyŏngsŏl Chʻulpʻansa
Published: 1998
Place of publication: Sŏul Tʻŭkpyŏlsi
Language: kor
Number of pages: 448
Subjects: Environmental protection.; Water -- Pollution.; Conservation of material resources.; Air -- Pollution.
Notes: Includes bibliographical references.