Klein, Franz
[Author];
Klein, Franz
[Founder];
Brockmeyer, Hans Bernhard
[Author];
Gersch, Eva-Maria
[Author];
Jäger, Markus
[Author];
Rätke, Bernd
[Author];
Ratschow, Eckart
[Author];
Rüsken, Reinhart
[Author];
Orlopp, Gerd
[Author]
;
Klein, Franz
[Other];
Orlopp, Gerd
[Other]