Autorzy
| Jerzy B. Karski | 1 |
| Napoleon Hill | 1 |
| M. Stiffler | 1 |
| Keller | 1 |
| McDaniel | 1 |
| O. Walker | 1 |
| M. Martin | 1 |
| D. George | 1 |
| Władysław Szymański | 1 |
| R. Laermer | 1 |
| Jerzy B. Karski | 1 |
| Napoleon Hill | 1 |
| M. Stiffler | 1 |
| Keller | 1 |
| McDaniel | 1 |
| O. Walker | 1 |
| M. Martin | 1 |
| D. George | 1 |
| Władysław Szymański | 1 |
| R. Laermer | 1 |