Seihin anzen kyōiku jigyō tō ni kansuru chōsa hōkokusho
Subtitle: Heisei 9-nendo Keizai Kikakuchō itaku chōsa
Publisher: Shōhisha Kyōiku Shien Sentā
Published: 1998
Place of publication: Tōkyō
Language: jpn
Number of pages: 111