2
by Grünhagen, Fritz
Published 1930
Springer Berlin Heidelberg

3
by Grünhagen, Fritz
Published 1940
Springer Berlin Heidelberg

4
by Grünhagen, Fritz
Published 1942
Springer Berlin Heidelberg

5
by Gruenhagen, Fritz, Grünhagen, Fritz, Klautke, Fritz
Published 1928
Springer Berlin Heidelberg