1
by Frey-Wyssling, A.
Published 1935
Springer Berlin Heidelberg

3
by Macleod, J. J. R., Gremels, Hans
Published 1927
Springer Berlin Heidelberg

4
by Gurwitsch, Alexander, Gurwitsch, Lydia
Published 1926
Springer Berlin Heidelberg

5
by Harms, Jürgen W.
Published 1926
Springer Berlin Heidelberg

6
by Harms, Jürgen W.
Published 1926
Springer Berlin Heidelberg