Schulze, Ingrid
[Writer of supplementary textual content];
Poppe, Eberhard
[Writer of supplementary textual content];
Stolz, Rüdiger
[Writer of supplementary textual content];
Irmscher, Johannes
[Writer of supplementary textual content];
Kertész, Andor
[Writer of supplementary textual content];
Heintze, Horst
[Writer of supplementary textual content]