Nihon Kankyō Kyōkai

• '92 リサイクル実践事例集
• Kankyō hairyo keiyaku oyobi gurīn kōnyū fukyū suishin gyōmu hōkokusho
• Seikatsu kankyōchū no denjikai no kenkō eikyō hyōka to anzen taisaku ni kansuru chōsa (Heisei 10-nendo) chōsa hōkokusho