1
by Hári, Paul
Published 1928
Springer Berlin Heidelberg

2
by Tangl, Franz, Hári, Paul
Published 1929
Springer Berlin Heidelberg

3
by Tangl, Franz, Hári, Paul
Published 1934
Springer Berlin Heidelberg

4
by Hári, Paul
Published 1918
Springer Berlin Heidelberg

5
by Hári, Paul
Published 1922
Springer Berlin Heidelberg