1
by Courant, Richard, Robbins, Herbert
Published 2001
Springer Berlin Heidelberg

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

3
by Courant, Richard, Robbins, Herbert
Published 1967
Springer Berlin Heidelberg

4
by Courant, Richard, Robbins, Herbert
Published 1992
Springer Berlin Heidelberg

5
by Courant, Richard, Robbins, Herbert
Published 1962
Springer Berlin Heidelberg