| Author | Popularity |
|---|---|
| Engels, Friedrich | 4 |
| Marx, Karl | 4 |
| Schnickmann, Artur | 4 |
| Merbach, Horst | 1 |
| Müller, Manfred | 1 |
| Nesler, Jutta | 1 |
| Skambraks, Hannes | 1 |
| Author | Popularity |
|---|---|
| Engels, Friedrich | 4 |
| Marx, Karl | 4 |
| Schnickmann, Artur | 4 |
| Merbach, Horst | 1 |
| Müller, Manfred | 1 |
| Nesler, Jutta | 1 |
| Skambraks, Hannes | 1 |