2
by Ritter, Werner H.
Published 1997
Vandenhoeck & Ruprecht
...DIGI20...

3
by Ritter, Werner H.
Published 2007
Vandenhoeck & Ruprecht
...DIGI20...

4
by Ritter, Werner H.
Published 2003
Vandenhoeck & Ruprecht
...DIGI20...

5
by Ritter, Werner H.
Published 2000
Vandenhoeck und Ruprecht
...DIGI20...