| Verfasser | Häufigkeit |
|---|---|
| Smits, Jan A. M. | 4 |
| Wttewaall, Otto J. | 4 |
| Allix, Jean | 1 |
| Breyer, Hiltrud | 1 |
| Burkert, Herbert | 1 |
| Dräger, Klaus | 1 |
| Falke, Josef | 1 |
| Feier, Peter | 1 |
| Garstka, Hansjürgen | 1 |
| Gebhardt, K. P. | 1 |
| Goyens, Monique 1959- | 1 |
| Iwens, Jean Luc | 1 |
| Klein, Stephan | 1 |
| Kubicek, Herbert 1946- | 1 |
| Mohr, Jörn-Rasmus | 1 |
| Nugter, Adriana C. M. | 1 |
| Smits, Jan M. | 1 |
| Woulds, J N | 1 |