"Sukoyaka oyako 21" kanren shiryō
Subtitle: boshi hoken repōto 2005
Publisher: Kōsei Rōdōshō Koyō Kintō Jidō Kateikyoku Boshi Hokenka; Sukoyaka Oyako 21 Suishin Kyōgikai Jimukyoku
Published: 2005
Place of publication: [Tokyo]
Language: jpn
Number of pages: 219
Other titles: "Sukoyaka oyako nijūichi" kanren shiryōn