Kōreisha nōryoku katsuyō sokushin no tame no konsarutingu
Subtitle: Shūgyō Jōken Senmon Bukai hōkoku
Publisher: Kōreisha Shūgyō Shisutemu Kentō Kyōgikai
Published: 1990
Place of publication: Tōkyō
Language: jpn
Number of pages: 240