- Capitalism--History--20th century (1)
- Division of labor--History (1)
- Division of labor--History--20th century (1)
- Industrial management--History (1)
- Industrial management--History--20th century (1)
- Labor--History--20 century (1)
- Machinery in industry--History (1)
- Machinery in the workplace--History--20th century (1)
- Working class--History--20th century (1)
- 分業--歴史 (1)
- 労働 (1)