1
by Christmann, Jürgen
Published 1993
Gabler Verlag
...Gabler-Studientexte...

2
by Christmann, Jürgen, Christmann, Merle
Published 1994
Gabler Verlag
...Gabler-Studientexte...

3
by Christmann, Jürgen, Christmann, Elke
Published 1995
Gabler Verlag
...Gabler-Studientexte...

4
by Christmann, Jürgen, Christmann, Merle
Published 1995
Gabler Verlag
...Gabler-Studientexte...