Rōjin hoken chōsa jigyō hōkokusho
Subtitle: Heisei 13-nendo
By: [henshū Hokkaidō Hoken Fukushibu Chiiki Hokenka]
Publisher: Hokkaidō Hoken Fukushibu
Published: 2002
Place of publication: Sapporo-shi
Language: jpn
Number of pages: 85