Shoteigai rōdō sakugen no susume
Subtitle: naze sakugenshinakereba naranai ka, sakugen no tame nani o surubeki ka
By: Satō Katsumi cho
Publisher: Rōmu Gyōsei Kenkyūjo
Published: 1991
Place of publication: Tōkyō
Language: jpn
Number of pages: 262
Subjects: Overtime; Hours of labor