Oishii mizu no tankyū
By: Kojima Sadao.
Series: NHK bukkusu -- 487
Publisher: Nihon Hōsō Shuppan Kyōkai
Published: 1985
Place of publication: Tōkyō
Language: jpn
Number of pages: 207
Subjects: Drinking water -- Japan.; Water -- Purification.; Water quality management -- Japan.