1
by Lindau, Gustav, Pilger, Robert
Published 1922
Springer Berlin Heidelberg

2
by Pilger, Robert, Lindau, Gustav
Published 1916
Springer Berlin Heidelberg

3
by Lorch, Wilhelm, Lindau, Gustav, Pilger, Robert
Published 1913
Springer Berlin Heidelberg

4
by Pilger, Robert
Published 1916
Springer Berlin Heidelberg

5
by Lindau, Gustav, Melchior, Hans, Pilger, Robert
Published 1914
Springer Berlin Heidelberg

6
by Lindau, Gustav, Pilger, Robert
Published 1911
Springer Berlin Heidelberg