Japan. Kagaku Gijutsuchō. Chikyū Kagaku Gijutsu Suishinshitsu

• Heisei 6-nendo kagaku gijutsu shinkō chōseihi ni yoru "Baikaru-ko no koteidei o mochiiru chōki kankyō hendō no kaiseki ni kansuru chōsa" hōkokusho