Dōro jigyō ni okeru keikan ni kansuru kankyō eikyō hyōka chōsa
Subtitle: Heisei 20-nendo tokushu anken tō kankyō eikyō shinsa chōsa : hōkokusho
Publisher: Purekku Kenkyūjo
Published: 2009
Place of publication: [Tokyo]
Language: jpn
Number of pages: 134
Subjects: Roads
Notes: Cover title.