Wilhelm, Jürgen
[Author of introduction, etc.];
Voigtsberger, Harry
[Author of introduction, etc.];
Kaczorowski, Andrzej W.
[Author of introduction, etc.];
Majchrowski, Jacek
[Writer of supplementary textual content];
Wsiołkowski, Adam
[Writer of supplementary textual content];
Kupka-Simon, Daria
[Writer of supplementary textual content];
Kupka-Simon, Daria
[Translator];
Bajek, Zbigniew
[Writer of supplementary textual content];
Uelsberg, Gabriele
[Writer of supplementary textual content];
Szoska, Antoni
[Writer of supplementary textual content];
Rogala, Elżbieta
[Translator]
;
Landschaftsverband Rheinland