- Author: Barbara Grunewald, Volker Römermann (editors)
- Language: German
- Year: 2008
- Author: Lutz Michalski, Volker Römermann (editors)
- Language: German
- Year: 2013
PartGG
pdf
- Author: Volker Römermann
- Language: German
- Year: 2017
- Author: Angela Dageförde, Christian Deckenbrock, Martin Henssler, Thomas Keß, Volker Römermann, Ulrich Stobbe, Volkert Vorwerk, Christian Wolf
- Language: German
- Year: 2022