About TSUSHIMA KAZUHIRO
About 青森県公害セ
About KUDO SEIICHI
About 青森県公害セ
About TESHIROMORI MITSUHITO
About 青森県十和田保健所
About 青森県公害センター所報
About water pollution
About Water pollution in general
About Water quality research and measurement in general
About 公共用水域
About 底質