Kakushu risaikuruhō no honkaku jisshi ga chūshō purasuchikku seihin seizōgyō e ataeru eikyō to taiōsaku
Series: Chūshō kōko repōto -- no. 2000-1
Publisher: Chūshō Kigyō Kinʼyū Kōko Chōsabu
Published: 2000
Place of publication: Tokyo
Language: jpn
Number of pages: 88