1
by Spielmeyer, W.
Published 1924
Springer Berlin Heidelberg

2
by Spielmeyer, W.
Published 1924
Springer Berlin Heidelberg

3
by Spielmeyer, W.
Published 1914
Springer Berlin Heidelberg

4
by Spielmeyer, W.
Published 1911
Springer Berlin Heidelberg

5
by Spielmeyer, W.
Published 1922
Springer Berlin Heidelberg