| Verfasser | Häufigkeit |
|---|---|
| Lisman, Anthony | 2 |
| Lisman, J. H. | 2 |
| Lisman, Jan J. W. | 2 |
| Water, Jeroen van de | 2 |
| Krebernik, Manfred 1953- | 1 |
| Lisman, A. J. | 1 |
| Lisman, John | 1 |
| Munnig Schmidt, E. | 1 |
| Riele, Herman J. te | 1 |
| Schoonderbeek, Carla | 1 |
| Schut, C. J. | 1 |
| Wevers, Leo | 1 |