1
by Courant, Richard
Published 1971
Springer Berlin Heidelberg

2
by Courant, Richard, Robbins, Herbert
Published 1967
Springer Berlin Heidelberg

3
by Courant, Richard, Robbins, Herbert
Published 1992
Springer Berlin Heidelberg

4
by Courant, Richard, Hilbert, David
Published 1924
Springer Berlin Heidelberg

6
by Courant, Richard
Published 1950
Springer New York

7
by Courant, Richard, Robbins, Herbert
Published 1962
Springer Berlin Heidelberg

8
by Courant, Richard, Robbins, Herbert
Published 1992
Springer Berlin Heidelberg

9
by Courant, Richard, Robbins, Herbert
Published 1967
Springer Berlin Heidelberg