| Code | Description | Fiches |
|---|---|---|
| 330 | Economics | 945 |
| 331 | Labor economics | 808 |
| 332 | Financial economics | 187 |
| 333 | Land economics | 275 |
| 334 | Cooperatives | 49 |
| 335 | Socialism & related systems | 672 |
| 336 | Public finance | 60 |
| 337 | International economics | 77 |
| 338 | Production | 745 |
| 339 | Macroeconomics & related topics | 57 |