280-sha kikai juchūgaku
Subtitle: Shōwa 62-nen 4-gatsu--Heisei 19-nen 3-gatsu. Naikakufu Keizai Shakai Sōgō Kenkyūjo itaku chōsa.
Contributors: Naikakufu Keizai Shakai Sōgō Kenkyūjo (Japan)
Publisher: Naikakufu Keizai Shakai Sōgō Kenkyūjo
Published: 2007
Place of publication: [Tokyo]
Language: jpn
Number of pages: 139
Notes: Chiefly tables.