1
by Courant, R., Hilbert, D.
Published 1968
Springer Berlin Heidelberg

2
by Courant, R., Hilbert, D.
Published 1924
Springer Berlin Heidelberg

3
by Hilbert, D., Bernays, Paul
Published 1968
Springer Berlin Heidelberg

4
by Hilbert, D., Bernays, Paul
Published 1970
Springer Berlin Heidelberg

5
by Hilbert, D., Cohn-Vossen, S.
Published 1932
Springer Berlin Heidelberg